It had rolled under the seat from the behind the seat storage in the pick up. Probably the only fully legal space would be in the pick up bed. But he thought he was bringing sporing equipment home, so why would he not put it inside the truck cab? Or so I assume his thinking went.
Also, IIRC, concealed weapons can be “wobblers”, something that can be charged as a misdemeanor or a felony, meaning it is easier to force someone to peal to a misdemeanor rather than for them to risk a felony conviction that will risk not only imprisonment but also a mark against employment and housing for life. Not sure if that is still the case these days.