KALAMAZOO, Mich. (AP): An autopsy has determined that a body found in an Indiana lake is that of a Michigan doctor missing since December.

The coroner in Porter County, Ind., confirmed Wednesday that it was Teleka Patrick's body that was pulled Sunday from Lake Charles in northwestern Indiana. The site is about 15 miles east of Gary and near where a car belonging to the 30-year-old doctor was abandoned Dec. 5 along Interstate 94.

The coroner says in a release that an investigation continues to determine the cause of death. Toxicology results are pending.

Michigan authorities say Patrick behaved strangely and erratically with colleagues and others in the hours before her disappearance.