The Armed Forces Crisis Intervention Notification Act is aimed at addressing missed opportunities by the military and civilian law enforcement to intervene before an Army reservist who had spiraled into psychosis opened fire at two locations in Lewiston, Maine, killing 18 people and injuring 13 others on Oct. 25, 2023.

"We have a chance to help service members in crisis. We have a chance to help protect our neighbors and families. We have a chance to save lives," Collins said in a statement. Maine's other senator, independent Angus King, is a co-sponsor of the bill.