I’m sure there are less romantic reasons for popping the question, but it’s hard to think of one.Murder suspect Michael Mitchell knew that his girlfriend could provide damning testimony if forced to take the stand against him in the death of 22-year old Armond Davidson. So Mitchell, 25, decided to get serious. About his relationship and the strength of his case.Unfortunately for Mitchell, the Snohomish County Auditor’s office happens to be located right next to the Sheriff’s office. So when he and his girlfriend tried to get a marriage license — to take advantage of a law that states that married couples can’t be forced to testify against each other in criminal trials — he was arrested.Mitchell is accused of shooting Davidson at a Lynnwood apartment complex two Sundays ago. According to witnesses, Davidson got involved in a fight between two women. As he went to hit one of them, Mitchell apparently pulled a gun and shot him in the head.The would-be betrothed stands accused of second-degree murder. His girlfriend is also being charged with rendering criminal assistance.