Homeless coworker living at store acting like he owns the building

My homeless coworker has started living at the store when they are off shift. They became displaced suddenly. I send them to a number of agencys and they got back to me saying they were going to find him housing. I also already helped three other coworkers get housed. This coworker who is living at store hs expressed that his housing plans fell through. Which is bad for everyone since while living here they now believe they are I'm charge of the store when off shift. So have been dictating workers on other shifts and yelling a people for supposed long lunches. Despite the fat cameras and timeclock would show proof if that was the fact. I not sure what to do about him.