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GlossaryCrime reporting systems

Hierarchy rule

The hierarchy rule generally selects one qualifying SRS offense in a multiple-offense incident. Learn its exceptions and effect on comparisons.

The hierarchy rule is an SRS counting convention that generally selects the highest-ranking qualifying offense when multiple offenses occur in one incident. It limits which offenses contribute to specified summary crime totals. It does not erase lower-ranked offenses from the underlying case or determine what charges a prosecutor may pursue.

Why the rule changes a total

An incident can contain more than one offense. Selecting only one of them creates a different statistical result from counting every separately reportable offense. The FBI's analysis of SRS and NIBRS explains that this reporting difference can make a transition to NIBRS appear to increase crime counts even when the underlying incidents are unchanged. FBI reporting comparison

The general rule has exceptions. Arson and human trafficking receive separate treatment under the applicable SRS instructions. A shorthand statement that SRS “always counts only one crime” would therefore be inaccurate.

NIBRS does not use the SRS hierarchy rule. It retains separate and distinct offenses within an incident, subject to its own classification and counting rules. That does not mean every allegation or every repeated act necessarily becomes an additional scored offense. FBI NIBRS manual

Example

Hypothetical example: An incident contains robbery and motor vehicle theft that qualify as distinct offenses. A comparable SRS summary selects the offense required by its hierarchy, while a NIBRS view retains both offense categories.

The NIBRS offense total can be larger even though both views concern the same event. Calling the difference newly committed crime would confuse a reporting change with an occurrence change. The example also does not authorize a reader to apply the rule manually without checking all relevant scoring instructions.

Common confusion

A hierarchy is an ordering used for a particular purpose. The SRS hierarchy is not a universal ranking of harm, sentencing severity, or investigative importance. It does not establish that an excluded offense was unimportant to its victim.

Other publications may use their own hierarchy to assign each victim or incident to one display category. For example, a local dashboard can prevent overlap by choosing a single category per person. Such a rule should be identified by its own documentation rather than called the SRS hierarchy automatically.

Comparing published figures

Check whether a table uses hierarchy-based counts, full NIBRS counts, or a conversion. The table title alone may not resolve that question. Preserve the same counting convention across years before calculating growth or ranking agencies; otherwise, the apparent difference can partly reflect which offenses the statistic permits to be counted.

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