Live updates: Bryan Kohberger sentenced to life without parole for Idaho student murders

Investigators said they conducted an extensive search for the knife they believe Bryan Kohberger used to kill four students in Idaho.

“There’s no evidence that we found that would lead us to any specific, even general, location as to where the murder weapon or the clothes have been,” Moscow police Cpl. Brett Payne said at a news conference today.

Idaho State Police Lt. Darren Gilbertson added that everywhere there was evidence indicating Kohberger’s whereabouts, “we searched that.”

He said authorities searched on the ground and in the water and even sent soil samples to determine if Kohberger had used a shovel.

“We searched everywhere that we possibly could but the reality is we were looking for a singular, small — it’s not that small — Ka-Bar knife,” Gilbertson said.

Some context: Several court documents unsealed in March, including a limited search warrant, revealed Kohberger had bought a Ka-Bar knife, a sheath and sharpener on Amazon eight months before the homicides.