A senior U.S. Justice Department official sent a letter to a lawyer for relatives of victims killed in the Sandy Hook Elementary School shooting, asking pointed questions about a retired FBI agent's involvement in a defamation lawsuit that led to a $1.4 billion judgment against conspiracy theorist Alex Jones. Martin sends lawyer letter asking about retired agentIn a Sept. 15 letter to Christopher Mattei, a lawyer who represents Sandy Hook families, Martin suggested he was scrutinizing Aldenberg's role in the lawsuit. It’s as disgusting as it is pathetic, and we will not stand for it.”The Justice Department said it had no immediate comment Tuesday. Relatives of the shooting victims testified that they were subjected to violent threats, in-person harassment and abusive comments on social media because of Jones. The Sandy Hook plaintiffs are now trying to liquidate Infowars' assets in state court proceedings in Texas.