Just did a quick dig since POTUS mentioned.

Maj. Matt Golsteyn

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Donald J. Trump

‏@realDonaldTrump

At the request of many, I will be reviewing the case of a “U.S. Military hero,” Major Matt Golsteyn, who is charged with murder. He could face the death penalty from our own government after he admitted to killing a Terrorist bomb maker while overseas. @PeteHegseth @FoxNews

7:03 AM - 16 Dec 2018

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From the articles I could find, it sounds like he pissed off some [spooks]/the wrong [clowns] in our Gov. & they retaliated.

• He mentioned the incident in a job interview with the C_A.

• And Golsteyn publicly criticized the strategy in Afghanistan in the 2011 book “The Wrong War: Grit, Strategy, and the Way Out of Afghanistan.”

https://freebeacon.com/national-security/afghanistan-war-hero-stripped-of-silver-star/

http://www.independentsentinel.com/persecution-of-major-matthew-golsteyn-by-obamas-army/

https://www.washingtontimes.com/news/2015/jul/19/green-beret-tells-of-shooting-taliban-in-cia-job-i/