NIBRS collects data on every single incident and arrest within twenty-three (23) offense categories made up of forty-nine (49) specific crimes called Group A offenses.  In addition to the Group A offenses, there are eleven (11) Group B offense categories, in which only arrest data is captured.  NIBRS is a reporting methodology through which all details of the incident are joined together by the incident number and allows for reconstructing all aspects of the incident, such as a weapon, location, victim, offender, offense, victim, etc. 

Group A Incident Reports include Administrative, Offense, Victim, Suspect, Property and Arrestee information. The following offenses are reported to the FBI as Group A Incidents:
Murder and Non-negligent Manslaughter - The willful (non-negligent) killing of one human being by another
Negligent Manslaughter - The killing of another person through negligence
Justifiable Homicide - The killing of a perpetrator of a serious criminal offense by a peace officer in the line of duty, or the killing, during the commission of a serious criminal offense, of the perpetrator by a private individual
Kidnapping/Abduction - The unlawful seizure, transportation, and/or detention of a person against his/her will, or of a minor without the consent of his/her custodial parent(s) or legal guardian
Rape - The carnal knowledge of a person, without the consent of the victim, including instances where the victim is incapable of giving consent because of his/her age or because of his/her temporary or permanent mental or physical incapacity
Sodomy - Oral or anal sexual intercourse with another person, without the consent of the victim, including instances where the victim is incapable of giving consent because of his/her age or because of his/her temporary or permanent mental or physical incapacity
Sexual Assault with an Object - To use an object or instrument to unlawfully penetrate, however slightly, the genital or anal opening of the body of another person, without the consent of the victim, including instances where the victim is incapable of giving consent because of his/her age or because of his/her temporary or permanent mental or physical incapacity
Fondling - The touching of the private body parts of another person for the purpose of sexual gratification, without the consent of the victim, including instances where the victim is incapable of giving consent because of his/her age or because of his/her temporary or permanent mental or physical incapacity
Robbery - The taking or attempting to take anything of value under confrontational circumstances from the control, custody, or care of another person by force or threat of force or violence and/or by putting the victim in fear of immediate harm
Aggravated Assault - An unlawful attack by one person upon another wherein the offender uses a weapon or displays it in a threatening manner, or the victim suffers obvious severe or aggravated bodily injury involving apparent broken bones, loss of teeth, possible internal injury, severe laceration, or loss of consciousness
Simple Assault - An unlawful physical attack by one person upon another where neither the offender displays a weapon, nor the victim suffers obvious severe or aggravated bodily injury involving apparent broken bones, loss of teeth, possible internal injury, severe laceration, or loss of consciousness
Intimidation - To unlawfully place another person in reasonable fear of bodily harm through the use of threatening words and/or other conduct but without displaying a weapon or subjecting the victim to actual physical attack
Arson - To unlawfully and intentionally damage or attempt to damage any real or personal property by fire or incendiary device
Extortion/Blackmail - To unlawfully obtain money, property, or any other thing of value, either tangible or intangible, through the use or threat of force, misuse of authority, threat of criminal prosecution, threat of destruction of reputation or social standing, or through other coercive means
Burglary/Breaking and Entering - The unlawful entry into a building or other structure with the intent to commit a felony or a theft
Pocket-picking - The theft of articles from another person’s physical possession by stealth where the victim usually does not become immediately aware of the theft
Purse-snatching - The grabbing or snatching of a purse, handbag, etc., from the physical possession of another person
Shoplifting - The theft by someone other than an employee of the victim of goods or merchandise exposed for sale
Theft From Building - A theft from within a building which is either open to the general public or to which the offender has legal access
Theft From Coin-Operated Machine or Device - A theft from a machine or device that is operated or activated by the use of coins
Theft From Motor Vehicle - The theft of articles from a motor vehicle, locked or unlocked
Theft From Motor Vehicle Parts/Accessories - The theft of any part or accessory affixed to the interior or exterior of a motor vehicle in a manner which would make the item an attachment of the vehicle or necessary for its operation
All Other Larceny - All thefts that do not fit any of the definitions of the specific subcategories of Larceny/Theft listed above
Motor Vehicle Theft - The theft of a motor vehicle
Counterfeiting/Forgery - The altering, copying, or imitation of something, without authority or right, with the intent to deceive or defraud by passing the copy or thing altered or imitated as that which is original or genuine; or, the selling, buying, or possession of an altered, copied, or imitated thing with the intent to deceive or defraud
False Pretense/Swindle/Confidence Game - The intentional misrepresentation of existing fact or condition or the use of some other deceptive scheme or device to obtain money, goods, or other things of value
Credit Card/Automatic Teller Machine Fraud - The unlawful use of a credit (or debit) card or automatic teller machine for fraudulent purposes
Impersonation - Falsely representing one’s identity or position and acting in the character or position thus unlawfully assumed to deceive others and thereby gain a profit or advantage, enjoy some right or privilege, or subject another person or entity to an expense, charge, or liability that would not have otherwise been incurred
Welfare Fraud - The use of deceitful statements, practices, or devices to unlawfully obtain welfare benefits
Wire Fraud - The use of an electric or electronic communications facility to intentionally transmit a false and/or deceptive message in furtherance of a fraudulent activity
Identity Theft - Identity theft refers to crimes in which someone wrongfully obtains and uses another person’s personal data (e.g., name, date of birth, Social Security number, driver’s license number, credit card number). For NIBRS purposes, LEAs should report this as Impersonation.
Hacking/Computer Invasion - Wrongfully gaining access to another person’s or institution’s computer software, hardware, or networks without authorized permissions or security clearances
Embezzlement - The unlawful misappropriation by an offender to his/her own use or purpose of money, property, or some other thing of value entrusted to his/her care, custody, or control
Stolen Property Offenses - Receiving, buying, selling, possessing, concealing, or transporting any property with the knowledge that it has been unlawfully taken, as by Burglary, Embezzlement, Fraud, Larceny, Robbery, etc.
Destruction/Damage/Vandalism of Property - To willfully or maliciously destroy, damage, deface, or otherwise injure real or personal property without the consent of the owner or the person having custody or control of it
Drug/Narcotic Violations - The unlawful cultivation, manufacture, distribution, sale, purchase, use, possession, transportation, or importation of any controlled drug or narcotic substance
Drug Equipment Violations - The unlawful manufacture, sale, purchase, possession, or transportation of equipment or devices utilized in preparing and/or using drugs or narcotics
Incest – Non-forcible sexual intercourse between persons who are related to each other within the degrees wherein marriage is prohibited by law
Statutory Rape – Non-forcible sexual intercourse with a person who is under the statutory age of consent
Pornography/Obscene Material - The violation of laws or ordinances prohibiting the manufacture, publishing, sale, purchase, or possession of sexually explicit material, e.g., literature or photographs
Betting/Wagering - To unlawfully stake money or something else of value on the happening of an uncertain event or on the ascertainment of a fact in dispute
Operating/Promoting/Assisting Gambling - To unlawfully operate, promote, or assist in the operation of a game of chance, lottery, or other gambling activity
Gambling Equipment Violations - To unlawfully manufacture, sell, buy, possess, or transport equipment, devices, and/or goods used for gambling purposes
Sports Tampering - To unlawfully alter, meddle in, or otherwise interfere with a sporting contest or event for the purpose of gaining a gambling advantage
Prostitution - To engage in commercial sex acts for anything of value
Assisting or Promoting Prostitution - To solicit customers or transport persons for prostitution purposes; to own, manage, or operate a dwelling or other establishment for the purpose of providing a place where prostitution is performed; or to otherwise assist or promote prostitution
Purchasing Prostitution - To purchase or trade anything of value for commercial sex acts
Bribery - The offering, giving, receiving, or soliciting of anything of value (e.g., a bribe, gratuity, or kickback) to sway the judgment or action of a person in a position of trust or influence
Weapons Law Violations - The violation of laws or ordinances prohibiting the manufacture, sale, purchase, transportation, possession, concealment, or use of firearms, cutting instruments, explosives, incendiary devices, or other deadly weapons
Human Trafficking, Commercial Sex Acts - Inducing a person by force, fraud, or coercion to participate in commercial sex acts, or in which the person induced to perform such act(s) has not attained 18 years of age
Human Trafficking, Involuntary Servitude - The obtaining of a person(s) through recruitment, harboring, transportation, or provision, and subjecting such persons by force, fraud, or coercion into voluntary servitude, peonage, debt bondage, or slavery (not to include commercial sex acts)
Animal Cruelty - Intentionally, knowingly, or recklessly taking an action that mistreats or kills any animal without just cause, such as torturing, tormenting, mutilation, maiming, poisoning, or abandonment. Included are instances of duty to provide care, e.g., shelter, food, water, care if sick or injured; transporting or confining an animal in a manner likely to cause injury or death; causing an animal to fight with another; inflicting excessive or repeated unnecessary pain or suffering, e.g., uses objects to beat or injure an animal. This definition does not include proper maintenance of animals for show or sport; use of animals for food, lawful hunting, fishing or trapping.

The following Group B Incidents are reported to the FBI:
Bad Checks - Knowingly and intentionally writing and/or negotiating checks drawn against insufficient or nonexistent funds
Curfew/Loitering/Vagrancy Violations - The violation of a court order, regulation, ordinance, or law requiring the withdrawal of persons from the streets or other specified areas; prohibiting persons from remaining in an area or place in an idle or aimless manner; or prohibiting persons from going from place to place without visible means of support
Disorderly Conduct - Any behavior that tends to disturb the public peace or decorum, scandalize the community, or shock the public sense of morality
Driving Under the Influence - Driving or operating a motor vehicle or common carrier while mentally or physically impaired as the result of consuming an alcoholic beverage or using a drug or narcotic
Drunkenness - To drink alcoholic beverages to the extent that one’s mental faculties and physical coordination are substantially impaired
Family Offenses, Nonviolent - Unlawful, nonviolent acts by a family member (or legal guardian) that threaten the physical, mental, or economic well-being or morals of another family member and that are not classifiable as other offenses, such as Assault, Incest, and Statutory Rape
Liquor Law Violations - The violation of laws or ordinances prohibiting the manufacture, sale, purchase, transportation, possession, or use of alcoholic beverages
Peeping Tom - To secretly look through a window, doorway, keyhole, or other aperture for the purpose of voyeurism
Runaway - A person under 18 years of age who has left home without the permission of his/her parent(s) or legal guardian
Trespass of Real Property - To unlawfully enter land, a dwelling, or other real property
All Other Offenses - All crimes that are not Group A offenses and not included in one of the specifically named Group B crime categories listed previously

Law enforcement agencies report the number of known index crimes (Murder, Rape, Robbery, Aggravated Assault, Burglary, Larceny Theft, Motor Vehicle Theft, Arson, and Human Trafficking) or offenses from their local records of complaints from victims, reports from witnesses and from crimes discovered by an agency during its operations.  Reports that are later determined to be unfounded are eliminated from the totals.  The resulting number of ‘offenses known to law enforcement officials’ is reported without regard to whether arrests were made, stolen property recovered or whether prosecution took place.  Agencies report additional data such as the value of property stolen and recovered, circumstances surrounding homicides, family violence, hate crimes, and reports of persons arrested for all crimes. Arrest reports are categorized by the arrestee’s age, sex, race, and ethnic origin.