Before dawn in McAllen, Texas, federal authorities executed a sweeping operation that exposed a stunning breach within U.S. law enforcement. Eighty-nine Border Patrol agents were arrested on allegations of collaborating with the Sinaloa Cartel, funneling billions of dollars’ worth of cocaine, methamphetamine, and fentanyl through the very checkpoints they were assigned to protect. Investigators say Station Commander Miguel Vasquez orchestrated the scheme, recruiting insiders, disabling surveillance systems, and safeguarding a network of cartel tunnels. The FBI’s “Operation Broken Shield,” built on wiretaps, undercover evidence, and a whistleblower’s testimony, dismantled the operation in a single morning—yet officials fear deeper corruption may still remain undiscovered.