Police in Southern California searching for missing TV star Naya Rivera say they are getting a clearer idea of where the Glee Star could be found. 

Robert Inglis of the Ventura County Sheriff's Office Search and Rescue Team said that the force was searching the "Northern half of the lake" but are confident his crew is getting a clearer idea of where in the lake to find the missing actress. 

READ MORE: Naya Rivera latest: Four-year-old son Josey Hollis saw Glee actress disappear beneath water

The actress sent a picture of her 4-year-old son, Josey, in front of a cove before she disappeared July 8. 

Addressing the media, he said: "There was a picture sent to a family member that showed the boy on the boat by a cove.

"We found where that cove was."

A time stamp on the photo shows it was taken 90 minutes to two hours before the boy was found alone on the pontoon boat according to reports.

READ MORE: Naya Rivera may have been incapacitated before she drowned, police say

He also confirmed that police had permission to share CCTV footage from the dock as well as audio from a 911 call from concession workers responsible for renting the boat who found the vessel without River onboard. 

Inglis told CBS News that the area where the photo was taken and the spot where the boat was found were starting points for authorities before the search was expanded.

He confirmed that divers could go down for 30-40 minutes at a time. 

"We did send our dive members to those two locations and searched those extensively."

Rivera remained missing as of Monday morning.