Police investigating death of man found floating in Colorado River

Agency spokeswoman Emily Fromelt identified the possible drowning victim as Robert Herd Warren, 66, of Sherman, Texas.

Warren and his wife were operating rented jet skis north of the Rio Lomas Beach when their watercraft became stuck in a shallow and rocky stretch of water Tuesday, Fromelt said. When his wife returned to the rental business seeking help, others found the life vest-equipped Warren floating in the river shortly before noon.

Efforts to revive Warren were unsuccessful.

Fromelt said investigators are trying to determine if Warren simply drowned or succumbed to a medical event.