Kansas City police have a bit of a reputation for doing this every six months or so for a while.

The story was that the kc police would sweep the town every few months and ship a couple of bus loads of homeless down here, and this continues until Springfield raised enough of a fuss at the state level about it. At which time kc switched to bussing them to somewhere in Oklahoma.

I grew up in KC and have heard this most of my life. So nothing to back this up but second hand anecdotal evidence, but that has been the story in KC for years.