Baltimore County police have charged a second man in the stabbing of an off-duty Baltimore police officer last week at a strip club in the Dundalk area. Glenn Christopher Lansinger, 27, of the 8200 block of N. Boundary Road in Dundalk was charged with attempted first-degree murder and assault in the attack early Thursday against Eric Jansen, 42. Lansinger and Lucas James Baumeister, 23, of the 400 block of Marjeff Place in Overlea, stabbed Jansen in the neck and lower back about 2 a.m. Thursday as the officer was leaving Christina's Female Revue, in the 4500 block of North Point Blvd., police said. Jansen then shot Lansinger once in the upper body, according to police. Jansen and Lansinger were taken to Maryland Shock Trauma Center in Baltimore after the incident. Jansen was treated and released Thursday, and Lansinger remains at Shock Trauma, where he was charged Friday evening by a court commissioner, according to police. Baumeister was being held without bail at the Baltimore County Detention Center. Police said investigators have not determined a motive for the attack. Jansen, a 15-year veteran of the city force, is part of a specialized gun unit in the Violent Crimes Impact Division.