Homicides always take a long time to process. Suspicious deaths like this one are scrutinized to the last detail by forensic. I wouldn't be at all surprised if the police are there for the majority of the day...even after the body's at the Coroner's office, there's still evidence to be gathered from the apartment itself.

Hopefully Will, your humble rental Mustang will be exonerated. h: I doubt it was complicit in any crime.