And it is a well-known that burglars, after they kill you, will wrap you in hefty bags and duct tape, take you out on a boat and dump you in the bay....../s
Possibly, but that would explain why there is no death timeline, why the dog was seen walking around with a leash by itself, and dumping a body out of a boat is a lot easier when someone else acts as a counter-balance as it's rolled out.