It was under his own will, the DEA just supplied him the means to do so.
It's basically as if I was in a seedy bar and spot a pistol on an undercover agent, and I tell them I know an easy spot to rob near the bar. Then the undercover agent gives me the pistol, asking for 20% of the take. It only turns into entrapment if I was talking about money problems and the undercover agent would have told me robbing a nearby convienence store could be an easy solve to my money troubles.