 Investigators regarded the Hernandez Case as an example of "controlled delivery" with surveillance and involvement of Mexican authorities rather than "gunwalking" or failure to attempt interdiction.The 2008 Alejandro Medrano case involved both ATF SAC William Newell and cooperating Tucson gun dealer Mike Detty of Operation Wide Receiver.ATF Phoenix allowed about 100 guns to be taken into Mexico over the objections of U.S. Immigration and Customs Enforcement (ICE) personnel who became aware of the case.