Dominique Johnson , 19 , was arrested on Wednesday and has been charged with conspiracy to commit armed robbery . She is the roommate and alleged girlfriend of Jamyra Gallmon , 21 , who last week was charged with second-degree murder . David Messerschmitt , 30 , was stabbed to death on February 9 at the boutique Donovan Hotel in Washington D.C. Gallmon has admitted to police that she set up the lawyer so that he was expecting to meet a man for gay sex at the hotel . When she attempted to rob him they got into a struggle and she pulled a knife from her pants and stabbed him repeatedly .
Dominique Johnson , 19 , was arrested on Wednesday and has been charged with conspiracy to commit armed robbery . She is the roommate and alleged girlfriend of Jamyra Gallmon , 21 , who last week was charged with first-degree murder . David Messerschmitt , 30 , was stabbed to death on February 9 at the boutique Donovan Hotel in Washington D.C. Gallmon has admitted to police that she set up the lawyer so that he was expecting to meet a man for gay sex at the hotel . When she attempted to rob him they got into a struggle and she pulled a knife from her pants and stabbed him repeatedly .