A man who gunned down one man and wounded three other people before killing himself wanted revenge for his firing as an administrator of a home for the retarded, police say.

"He knew his victims by their first names and asked for them specifically when he came to their home," state police spokesman Steve McCausland said of Alan Matterson, 36, of Cumberland."He was a broken man" as a result of the investigation that prompted the state to seize control of the group home and which led to Matterson's dismissal in 1987, McCausland said.

Matterson was fired from his job at the former Androscoggin Community Home in Mechanic Falls, a home for 14 mentally handicapped adults.