So I'm guessing things that police are looking to prove / verify are:
- Who was driving the car recently, and who placed her in the trunk (via CCTV, Tesla camera, Fob / App data, witnesses)
- Whose DNA is in the car (Swabs, testing for blood or cleaning products?)
- If Celeste died inside the home (Blood swabs, DNA swabs, cleaning products, leftover personal items, CCTV from the home, phone location analysis)
- Celeste's time & cause of death (autopsy, toxicology, cell phone data, CCTV analysis, credit / debit card or other proof of life, messages from D4vd's devices that may indicate something - for example if he abruptly stops texting / calling her)
- D4vd's whereabouts at the time Celeste passed (Tour dates, witnesses, cell phone location, home CCTV)
- If there is one - a murder weapon? (Home searches, searches of the surrounding space, searches of his other vehicles, following movements of the car and searching where it had been)
- Motive (Phone & laptop messaging analysis, analysis of Celeste's phone, personal items such as a diary or song lyrics he had jotted down after she died)
- When she was placed in the vehicle (CCTV & car data)
- Who else was aware / complicit (messages, car data, who else was driving the car if not D4vd?)
AS WELL AS detangling their entire relationship via online messages to prove any grooming / p3dophilia charges. That's a lot of work to do in order to get a solid case going.
Speaking of, where is her phone? I wonder if it was found with her. Doubt it.