An autopsy performed Tuesday on the body found Sunday in Lake Charles in the town of Porter did not immediately reveal the cause of death or confirm the person's identity.
Porter County Coroner Chuck Harris said Tuesday afternoon he had hoped fingerprinting could be used to positively identify the body, but initial attempts to use that method were not successful.
Harris said more information might be released Wednesday morning.
About 7:10 a.m. Sunday, a local fisherman called Porter police to report something suspicious floating in Lake Charles at the town park.
State police and members of their scuba team, along with Porter Fire and Rescue members, responded to the scene. A female body dressed in dark clothing was recovered from the water.
The location is the same area where a search was conducted in January for Teleka Patrick, a missing doctor from Kalamazoo, Mich.
Police previously searched the area for Patrick, who has been missing since December. Indiana State Police, the Kalamazoo County Sheriff's Department, the Washtenaw County Sheriff's Department and the Kalamazoo office of the FBI searched the lake but did not find anything.
Patrick, 33, was last seen Dec. 5 after she was dropped off in the parking lot of a medical center in Kalamazoo where her car was parked. That same night, Indiana State Police found Patrick's gold 1997 Lexus ES300 abandoned on westbound Interstate 94 just east of the Porter/Burns Harbor exit.
That exit is adjacent to Lake Charles.
Patrick was reported missing Dec. 6 after she failed to report to work.
Kalamazoo authorities said detectives were looking into the possibility that the body found Sunday could be that of Patrick, but that has not been confirmed.