ST. IGNACE, Mich. – Michigan State Police are investigating the mysterious disappearance of a woman who went missing west of the Mackinac Bridge last week. Dennard’s family has been searching for her since her crashed car was found five minutes away from the Mackinac Bridge. She crossed over that bridge at 5:15.”Aaron Dennard said his wife suffers from mental instability. Channelle Dennard went off on her birthday and drove north. Aaron Dennard decided to track the phone, and he said he can tell she’s been on the move.