They went straight for the safes. Knew where a lot of the hidden ones were? or just found them. Didn't really even toss the clothes and shoes, they aren't trying to find small amounts of drugs or whatever, they want whatever they thought was in, or used to be in the safes.
Cassie probably told them a lot. That's my best thinking. She lived with or near him for years. Knows his habits.
My guess is IPads, old phones, pictures and videos. They want to put him in certain places with a victim, like Cassie.
She says on this day we flew from LA to NYC, and then they have a picture taken on or around that date. Then they get the flight manifest or the testimony of the pilot.
This is what a lot of the Ghisaline Maxwell trial looked like. You get three witnesses telling the same story, with corroborating evidence, that's a case right here. One a jury will probably convict on.