- "He reached out to an arms dealer I had on a watch list. He's got two priors and wants to avoid a third, which is a problem because we just caught him with 10,000 rounds of military-grade ammo."
"Jack DeLeon. Yeah, I heard about it."
"Castle is the buyer. I guess he needs bullets for all those guns he stole from the Greeks."
- ―Dinah Madani and Sam Stein[src]
Jack DeLeon is a weapons dealer active in New York City.
At his work as arm dealer, Jack DeLeon received two priors. Following his second prior DeLeon had been trying to avoid a third. DeLeon was caught by the United States Department of Homeland Security with 10,000 rounds of military-grade ammo. Not long before he was caught DeLeon had been contacted by Frank Castle, who wanted to buy the bullets from him. Since he got caught with the bullets he was unable to complete the deal.