Members of a congressional committee at a public hearing Wednesday blasted former President Barack Obama and his attorney general for allegedly covering up an investigation into the death of a Border Patrol agent killed as a result of a botched government gun-running project known as Operation Fast and Furious. The House Oversight Committee also Wednesday released a scathing, nearly 300-page report that found Holder's Justice Department tried to hide the facts. Terry died in a gunfight. [His] death exposed Operation Fast and Furious, a Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) operation in which the federal government allowed criminals to buy guns in Phoenix-area shops with the intention of tracking them as they were transported into Mexico. But the agency lost track of more than 1,400 of the 2,000 guns they allowed smugglers to buy. Two of those guns were found at the scene of Terry's killing. Sen. Charles Grassley, R-Iowa, testified Wednesday in front of the committee, accusing DOJ and ATF officials of obstructing the investigation and working to silence ATF agents who informed the Senate of Fast and Furious. One of those silenced ATF agents, John Dodson, testified Wednesday that he remains in a state of purgatory" since objecting to Fast and Furious and has been the subject of reprisals. Grassley's and Dodson's testimony reinforced findings of the report, which states that the Justice Department knew before Terry's death that the ATF was "walking" firearms to Mexico and knew the day after the agent's death that Fast and Furious guns were involved in the shootout -- despite denying these facts.