Car of informants’ dad found with note: Shut up or we send you his head
October 8, 2011 2:07AM

The father of two informants for the U.S. Drug Enforcement Administration vanished in Mexico under sinister circumstances during a Chicago-based investigation of the Sinaloa Cartel, officials say.

The father traveled to Mexico in 2009 despite a warning from DEA agents that he was in danger. His car was later found — along with a message left on the windshield.

“Shut up or we are going to send you his head,â€