I'm fairly confident all of those are wrong. The backpack of the shooter doesn't have the black bits.

Shooter's bag looks like 100% fabric (so he can swap it later or ditch/destroy it). If I were him, it'd be a fairly cheap large fabric bag, with a few changes if clothes and extra backpacks inside. Get on a long-distance bus, change in the bathroom, get off before your stop and do this a few more times.

Also, buy everything from a thrift store. It'd save money and cover your tracks.