Charging documents released Monday allege painting contractor Lukasz Szkiluk, 63, had the woman, identified only as his girlfriend, bound in his home when he killed his wife, Karolina Derezinska-Szkiluk, 38, Saturday in the Highlandtown neighborhood of Baltimore.
Police said Szkiluk shot and killed his wife after tying up his girlfriend, with whom he had been drinking at home.
He told the girlfriend, "I did it," court records show, and then untied her, bound her hands with duct tape, took her into another room to show her the dead woman, forced her upstairs and tied her to a bed.
She chewed through the ropes, freeing herself, and called 911, police said.
Szkiluk left the home and was arrested on first-degree murder and other charges when he returned, The Baltimore Sun reported Tuesday. He was being held without bond and had not entered a plea as of Tuesday morning.