I don' t think it has anything to do with drugs & everything to do with just plain murder. That neighbor, who ever he is murders people & maybe most are never found even. They didn't even know he was there.. But yes, a sort of panic dump. He hired under a false name? Do you know that name? So somewhere he is, with a real name , thinking he is safe. He might be but they really should ask for help of the public. He must already had access to another car, he vanished & he had a sort of to-go bag ready. He has a place somewhere else, that they don't know is his, probably not in Glasgow.
How do you rent out on a false name, don't they verify with driver's licence.
How do you rent out on a false name, don't they verify with driver's licence.