PORTLAND, Maine (AP) – The parents of an Army veteran shot and killed by a Farmington police officer during an armed confrontation have a filed a federal wrongful death lawsuit. The lawsuit is against the officer, police chief and town. Authorities say 28-year-old Justin Crowley-Smilek was fatally shot outside Town Hall in November 2011 after threatening the officer with a knife. Crowley-Smilek was suffering from post-traumatic stress from duty in Afghanistan. The suit filed last week alleges civil rights violations and alleges the officer never called for backup, continued firing after Crowley-Smilek was disarmed and was not fully trained. It seeks unspecified monetary damages. Farmington Town Manager Richard Davis says the town attorneys are formulating a response. An investigation by the state attorney general’s office determined that the officer was justified in using deadly force.