The comment by the police that the crime was "somewhat domestic related", makes me think that your first thought might very well be correct.
Yeah back in the day I knew of some Chicago scumbags who would open P.O. Boxes in the 5 welfare-rich states MN,WI, ND,SD & IA just to collect welfare and every month make the trip to collect the checks.
It’s a little tougher now with WI cutting their bennies to nothing and now everyone is paid electronically with cross referencing.