The case of the mysterious disappearance of a Michigan doctor led investigators to a Northwest Indiana lake last week.
Teleka Patrick was last seen in Kalamazoo, Michigan on Dec. 5. Her car was found in a ditch hours later along Interstate 94 about 100 miles away in northern Indiana. Patrick's wallet, cash and identification were in the car, but not her keys.
Indiana State Police announced that they conducted a search operation on Lake Charles in Porter, Indiana on Jan. 23. The lake is adjacent to the Porter/Burns Harbor exit where the vehicle was found.
Investigators used sonar equipment system to search the lake, but officials say the sonar search did not indicate anything of evidentiary value.
Police announced last weeek that Patrick behaved strangely and erratically with colleagues and others in the hours before her disappearance.
A pair of YouTube videos posted three weeks before her disappearance showed Patrick making breakfast and singing a song to a love interest, someone her family says they did not know.
Patrick was raised in New York and graduated with a medical degree and a doctorate in biochemistry from Loma Linda University in California. She had been serving her medical residency at Borgess Medical Center in Kalamazoo.
(Correction: This article, originally published Jan. 29, 2014, misspelled Teleka Patrick's first name.)