The wife of a suicidal Windham man who was shot and killed by a Cumberland County sheriff’s deputy last year has filed a $2 million lawsuit against police saying her husband posed no threat to anyone other than himself when the officer “unilaterally opened fire with his rifle.” Vicki McKenney, who watched from the back of a police cruiser as an officer shot her husband in the head, said in the wrongful death suit filed in Cumberland County Superior Court in Portland that police made no effort to de-escalate the situation or communicate with 66-year-old Stephen McKenney as he emerged from his garage on April 12, 2014, with a revolver in his hand. The lawsuit names as defendants Deputy Nicholas Mangino, the officer who fired the fatal shot; the Cumberland County Sheriff’s Office; and the Windham Police Department, whose officers were present during the shooting. The lawsuit was filed on Feb.