To do an investigation of the house would be a wits+investigation roll as per core. Each roll would represent 1 hour of work, and would represent various amounts of ransacking the place to figure out every nook and cranny. At 1 roll the house will be completely intact, just lightly movable things moved around. at 2 rolls, heavy furniture is moved around. At 3+ rolls, various immovable objects are forced to move, resulting in structural damage.
Crawley's extended scrutiny of the bedroom yields no new information. No temporal distortions or magical workings go on in the bedroom itself, at least, not recently enough to be easily seen.