UPDATE: Police searching for Naya Rivera's body say she may never be found.
The 33-year-old Glee actress is presumed to have drowned during a boating outing earlier this week on Lake Piru in Southern California.
According to Ventura County Sheriff's Office Sgt. Kevin Donoghue during Thursday's press conference, "If the body's entangled in some way, it may not come back up."
Donoghue notes that those waters are dangerous for recovery divers, adding that visibility is "not very good."
Watch the press conference below:
Stay tuned for the latest updates.