This beetle is believed to have entered North America by ports, hitching a ride on products from overseas, and some say they were introduced to naturally control the aphid population. The beetle is like a Cluster Fly, trying to overwinter in heated structures.
Control for this beetle is to try and seal up cracks and crevices along the exterior of the structure, but with the temperatures differing greatly throughout the year, the treatment is to treat the exterior of the home to eliminate them as they try to enter, paying particular attention to cracks and crevices around windows, doors, and eave areas. The whole house gets treated.