Massacre
Massacre
Powers:
 
Massacre is unable to feel emotions for his common man, and has no problem killing innocent people.
Weapons: Massacre uses a number of automatic weapons and bombs.
 
Origins:
 
Husband and wife, Marcus and Judy Lyman, were successful Wall Street traders. A disgruntled client who'd lost their life savings parked a car bomb in front of their offices, and the resulting explosion sent shrapnel through Marcus' brain, in addition to killing his wife, Judy, who died in his arms. The shrapnel severely damaged the parts of his brain that dealt with how he related to others, his morals, and ethics. He later became a patient of Dr. Ashley Kafka, who recommended he stay in observation indefinitely. He managed to escape the institution and began a criminal career as Massacre.
 
Notes:
Massacre at Marvel Database
Massacre at Comic Vine