Dennis Brandt was identified as the shooter at Middlesex County's Apple Rehab on Berlin Road in Crowell, authorities said.
Cromwell Police received a 911 call just before 11 a.m. to reports of a shooting at the center. When they arrived, they found the bodies of Dennis and Barbara Brandt suffering from bullet wounds.
Authorities said Barbara was a longtime resident of the center.
Investigators believe Dennis walked into her room and opened fire. Police did not speculate on a motive.
Apple Rehab offers nursing care and rehabilitation for seniors. The center reopened Friday afternoon, authorities said.
The shooting remains under investigation.
Click here to follow Daily Voice Groton and receive free news updates.