Officials have released a 911 call made after missing "Glee" actress Naya Rivera's son was found on a rental boat on a lake in California.
"The emergency is: We have a missing person," an employee of the rental boat business said. "We found a little girl in one of the boats by herself, and the mom's nowhere to be found."
The caller initially assumed Rivera's child, a 4-year-old boy, was a little girl because of his long hair, CBS Los Angeles reports.
The Ventura County Sheriff's Department also released security video of 33-year-old Rivera and her child getting into the boat together on Lake Piru in Los Padres National Forest on Wednesday afternoon.
"They were able to conclude that they were the only two on the boat when the boat left the dock," Sargeant Kevin Donoghue said.
Donoghue said at a news conference Thursday that Rivera and her son rented the boat at approximately 1 p.m. local time Wednesday. The rental was supposed to last for three hours, and when the pair had not returned by 4:30 p.m., workers went out to search for them.
The boy told authorities he and his mother had been swimming in the lake, and said he got back in the boat but his mother did not, according to a report from the Ventura County Sheriff's Office.
Rivera's son was found Wednesday afternoon sleeping in the boat and wearing a life jacket. An adult-sized lifejacket was also found in the boat.
"We've had no indication, after talking to her son, that Ms. Rivera made it to shore," Donoghue said.
Deputies said Rivera had experience navigating Lake Piru, but even the most experienced swimmers could succumb to the lake's dangerous rip currents or get tangled up in debris.
"Under the water, it's a lot by feel," said Max O'Brien, one of the divers in the search for Rivera. "There's a lot of shrubbery and sticks that we have to break through as we're going through, so it's kind of a Braille search."
Authorities said Friday that divers only had about 1 to 2 feet of visibility in the lake, making the search extremely challenging. Divers are mostly focusing on the north and east side of the lake, based on where the boat was found.
A petition created Thursday demands that authorities put up warning signs about the lake's powerful undertow. It has since been signed by nearly 20,000 people.
"Naya Rivera is not the first, nor the last to go missing at Lake Piru," wrote petition organizer Erin Jordan. "Lake Piru is a very deep lake with very bad whirlpools, people have been asking for years for the city to put up warning signs for swimmers. Locals of Ventura County don't go to Lake Piru for this reason! Tourist have no idea what they're getting into."
"Lake Piru needs signs. We're tired of waiting. We need justice for all those who got lost at Lake Piru. Put up the signs."
Officials Thursday said the search and rescue effort had turned into a search and recovery effort, with. The search, now in its third day, continued Friday morning.