A man who was arrested then questioned about a deadly ambush at a Pennsylvania State Police barracks has sued claiming he was traumatized by overzealous troopers who detained him based on mere speculation.

Jeffrey Hudak, 49, of Clarks Summit, PA, contends he was arrested and handcuffed about 12 hours after Cpl. Bryon Dickson was killed and Trooper Alex Douglass was wounded outside the Blooming Grove barracks on Sept. 12, 2014.

The alleged gunman, Eric Frein, was eventually captured after a 48-day manhunt and is jailed awaiting trial, ABC News reports.

But on the day after the shooting Hudak contends he was a prime suspect merely because his estranged wife had a relationship with Douglass. Hudak was arrested without explanation by troopers in SWAT gear who surrounded his mother's home, the lawsuit said.

"Pennsylvania State Police had absolutely no legal basis for the warrantless arrest," according to the lawsuit filed in Thursday in U.S. District Court in Scranton.

Hudak alleges he was questioned for hours and denied an attorney even though one showed up at the barracks where he was being questioned. He was kept from using the restroom until he agreed to give a DNA sample and undergo testing for gunpowder residue, the lawsuit said.