As the search for the body of Glee actress Naya Rivera continues at Lake Piru in California continues, Ventura County Sheriff’s Office spokesman Sgt. Kevin Donoghue told reporters Thursday afternoon, "If the body is entangled in something underneath the water it may never come up." People reports that Donoghue explained that visibility in the lake at this time of the year is "not very good, it's terrible," adding, "There's a lot of trees and plants and such that are under the water that can cause entanglement. Makes it unsafe for divers and a complicated search," he said. Police also told the outlet before the press conference that they are "confident" that Rivera is still in the water. Donoghue said that if Rivera is not found Thursday, the search will continue, and around 80 searchers are actively involved. "The decision to end the search will be really formulated when we are confident we have done everything we can do to search as much as we can search, but we are not there yet," he said.