At one point, he somehow acquired a belt with micro-circuitry of unknown origin that could give him the Blue Shield powers, and used it to fight his family and various other criminals.

He did a good job but resigned after he failed to protect the project from the alien life-form called Omnivore.

[5] The Blue Shield originally wore a micro circuitry-lined belt which artificially enhanced his strength, speed, stamina, agility, reflexes, and reactions, and endurance to near superhuman levels.

The micro circuitry-lined belt is of both unknown origin and design and grants Cartelli the ability to generate a powerful force field around himself, greatly increasing his body's resistance to physical injury.

While surrounded by the field, Cartelli can withstand high caliber bullets, powerful impact forces, heat, punctures, and concussion without sustaining injury.