The ride turned ugly when Furer and another former Marine, Gregory Blake became caught up in a violent road rage incident in late 2008. As Furer allegedly chased Blake through the streets of Washington in their SUVS, Furer struck a motorcyclist, throwing the cyclist to the pavement and breaking his femur, according to a lawsuit that followed. When police arrived, Furer flashed his senate ID and told them he worked for Sen. Vitter, according to court records. Furer's insurance company settled the civil case.
Blake said he was outraged to learn where Furer worked.
"That guy should not be working for the U.S. government," he said.
After ABC News sent questions to Furer, Retired Marine General James E. Livingston wrote to defend the senator's decision to keep him on staff. Furer, the general said, "witnessed unspeakable tragedies most in life are fortunate enough to have never witnessed" while serving in Kuwait.
"This is clearly politically driven and it's unfortunate that some are willing to ruin the reputation of a Marine veteran for a political story," Livingston wrote. "When faced with Brent's troubles, Sen. Vitter could have chosen political expediency and allowed Brent to flounder on his own in a time of need. Instead, he tried to allow Brent the best opportunity to seek help and get better while never downplaying the severity of the charges."