28-year-old Aaron Lee Howard of Vincennes died of drowning. That was the result of an autopsy conducted Friday by the Knox County Coroner. Howard’s body was found this past Thursday in Indian Lake near College Avenue. He had been reported missing earlier in the week. The man, described as having schizophrenia and mental illness, was last seen and heard from on March 8th. Authorities believe he may have become disoriented. Authorities say foul play was not a factor in the death.