Personal Info:
Real Name: Bennett Brant
Also Known As: No known Alias
Place Of Birth: Unknown
First Appearance: Amazing Spider-Man Vol.1 #11 (1964) Silver Age Villain
Known Associates: Jack O'Lantern, Toxin, Human Fly, Megatak, Death Adder
Group Affiliation: Leader of the Savage Six
Base Of Operations: New York City, New York
Grudges: Venom
Creators: Stan Lee and Steve Ditko
Crime-Master is a skilled criminal mastermind, assassin, and lawyer.
Gas Gun: Crime-Master carries a gas-pistol that can be loaded with a number of specialised cartridges, including tranquilizing "geek gas", sonic gas (vapours that produce an intense audio effect), vaporised napalm mist, and poison gas.
Bennett Brant was the brother of Betty Brant who got into gambling debt with a gangster named Blackie Glaxton to pay for his mother's medical bills. With the help of Doctor Octopus, Blackie Gaxton kidnapped both Bennett and Betty as insurance against anyone preventing him leaving the country. Bennett was double crossed when Glaxton refused to free him of his debts and was fatally shot during a melee between Glaxton's gang, Doctor Octopus and Spider-Man.
Apparently, Bennett didn't die and was taken by a criminal organization, which chose him to become the new Crime-Master. Bennett kidnapped a young boy, who he wanted to become his disciple and taught him to kill. At adulthood he became his own Jack O'Lantern.
Crime-Master at Marvel Database
Crime-Master at Comic Vine
Crime-Master at Marvel Universe: The Appendix