(AP) — A Nebraska bill that would let civilian crime-prevention groups patrol the streets with flashing amber lights on their vehicles has fallen by the wayside in the Legislature.

Supporters on Tuesday fell one vote short of the support needed to stop a filibuster by state Sen. Ernie Chambers of Omaha. Chambers has argued that citizens shouldn’t act as law enforcement officers.

The bill was inspired by citizen groups in Omaha that patrol neighborhoods to deter crime. The groups are taught by police to observe and report crimes, but they aren’t supposed to confront the perpetrators.

Sen. Scott Lautenbaugh of Omaha says he introduced the measure so group members could use the caution lights to alert people of their presence.

The bill stalled during second-round debate.