The St. Louis County prosecutor's office has charged 38-year-old Christopher Colletta with the murder of his wife, Mary Colletta, Tuesday on the top floor of a parking garage at St. John's Mercy Medical Center in Creve Coeur.

Colletta allegedly stabbed his 30-year-old wife -- an employee of the hospital -- more than a dozen times between 4:30 and 5 p.m. on August 3. Last month Mary Colletta had obtained a restraining order against her estranged husband in Jefferson County where he lives.

A family member reportedly turned Christopher Colletta into Creve Coeur police.