found the following clue on the kitchen desk in Black's residence during driver's seat case.
its an instaheat receipt (I think the pipe from the freight depot also said instaheat on it)
it says
instaheat
los angeles california
statement
customer: adrian black
Date: 1/4/47
address: 620 Bunker Hill Ave.
1 InstaHeat Model 12 $82.50
Gas heater
Installation $12
Pipe Work & Plumbing: $11
Delivery
H. Ryan
Am I getting closer to solving the case and being promoted for homicide? 
