President Trump tweeted Sunday that he would “review” the case of Maj. Matt Golsteyn, a Green Beret who’s been charged with premeditated murder. After Golsteyn told the CIA in 2011 that he killed an Afghan man he suspected of being a bomb maker in 2010, the military reprimanded him but did not press murder charges. But after Golsteyn admitted to the killing in a 2016 interview on Fox News, the Army reopened an investigation and recently charged him with murder. On Sunday, President Trump tweeted, “At the request of many, I will be reviewing the case of a 'U.S. Military hero,' Major Matt Golsteyn.” Legal experts say the president’s tweet threatens to undermine an ongoing criminal prosecution.