A Marine facing military discharge for mistakenly sending a threat warning from an unclassified email account is now getting bipartisan support on Capitol Hill from members who say he used the fastest and only method available to respond.

New York Democratic Sen. Kirsten Gillibrand is among the most recent congressional lawmakers to support Maj. Jason Brezler, a Marine Corps reservist, who faces a military hearing for his actions.

Gillbrand, a member of the Senate Armed Services Committee, sent a letter earlier this week to a Marine general arguing Brezler was responding to an “urgent” request from fellow soldiers in Afghanistan concerned about a senior Afghan police official and that he immediately reported the potential security breach.

Brezler told his fellow Marines the official was a security risk, in part because of allegations he sexually abused minors on U.S. bases in Afghanistan.

Days later, one of the official’s assistants and purported victims opened fire and killed three U.S. Marines.

The senator said Brezler, a New York City firefighter, was somewhere in Oklahoma at the time of 2012 request that “precluded him from accessing … classified military networks” and that officials please “exercise discretion and leniency” when considering punishment, considering the circumstances.