The bomb placed by the lawyer is moot as his Boss said he was at work a thousand miles north I believe (exact distance unknown) when suspect device was placed.
I rent cars to vacation in to save wear and tear and get a new one if I have a breakdown within an hour versus sitting at a dealer waiting to get something "bad" fixed. So that was plausable (with me anyway :o)
The guy has a history of bike riding daily so the bike is not a question either IMHO. Even had he not taken his own I suspect he'd have rented one to enjoy the Florida Sunshine ect ect.... and exercise.
In reality I just do not know. That's why the SWAG. My serious guess is a neighbor or co-worker did the bomb planting and the lawyer stumbled into the zone of this guys panic factor and killed in self defense and ,as a lawyer knows to shut his mouth till court hearing, we just won't hear what really happened till then IMHO....
Stay Safe !!