We know it wasn't Doug. His alibi is "solid" and "true". They are not taking his friends words for this, folks. This isn't a jaywalking case. He is smart enough to have an iron clad alibi, but stupid enough to let his hit man try to frame him. Because that's one incompetent hit man who leaves all the evidence pointing towards the person who hired him. Doug is disciplined enough to be a decorated Marine, but careless enough to leave the receipt for the items from the "4 Essential Things You Need To Commit Murder With Now Available at Wal-Mart!" handbook. BTW, they forgot the "Shaggy Haired Guy Wig" by Eva Gabor.
Who else could have access to things like the keys to the truck and the credit card? Who indeed.
If Venus met with a horrible fate, we need to look at who has deflected suspicion the most away from himself. Motive? This could kill two birds with one stone. There was a will, and since VS had no real property, was the will to name life insurance beneficiaries and guardians? There's financial. And to have the man that made allegations against you in the hot seat for murder 1 would be gravy. There's revenge.
"I wuz sleeping"-it's the new " I wuz at werk"!