Johnny Ouch, 20, of Westbrook, was arrested Thursday morning and charged with murder and elevated aggravated assault stemming from an incident in May in which Treyjon Arsenault of Westbrook was killed and another man seriously wounded.

Ouch was arrested without incident by members of the Maine Violent Offenders Task Force working in coordination with Portland police detectives. He was located on East Valentine Street in Westbrook around 11 a.m.

Charges are in connection with the shooting death of 19-year-old Treyjon Arsenault and the shooting of another man on May 25 at Da Block Studios, 371 Fore St. in Portland. The second victim, whose identity is not being released at this time, is recovering from gunshot wounds, police said.

“This is a complex investigation, which is still continuing,” said Portland police Assistant Chief Vern Malloch.

Ouch is being held without bail at the Cumberland County Jail pending an initial court appearance.