A criminal complaint charges that Mr. Pan, for example, used straw donors to arrange for a $16,000 contribution to Mr. Liu's campaign — from a purported Texas businessman who called himself Richard Kong but who was actually an undercover F.B.I. agent participating in a sting operation.
Each agent participating in the collaboration is composed of a local module and a collaboration module.
On April 22, 131 immigration agents participated in the raid.
In all, the bureau said, more than 1,000 agents participated in the investigation and the sweeps.
The inspector general, Glenn A. Fine, found that in a few instances, F.B.I. agents participated in interrogations using pressure tactics that would not have been permitted inside the United States.
The initiatives come amid a surge in successful interdictions in Honduras since May — but also as American officials have been forced to defend their new tactics after a commando-style team of D.E.A. agents participated in at least three lethal interdiction operations alongside a squad of Honduran police officers.
According to the Los Angeles Times, state agents participated in 250 raids on illegal marijuana operations in California last year, yielding over 600,000 marijuana plants and 15,000 pounds of processed marijuana.
In 2012, for example, DEA agents participated in a raid in Honduras that left four innocent people murdered, including a teenager and two pregnant women.
The controversies came to a head in April when the DOJ announced that DEA Administrator Michele Leonhart would be stepping down after allegations that DEA agents participated in cartel-funded "sex parties" with prostitutes in Colombia.
They also represent a departure from the former head of the drug agency, Michele Leonhart, who resigned earlier this year amid allegations that DEA agents participated in "sex parties" with prostitutes in Colombia.
