I must disagree with Finnish Air Force here. In the OP, I clearly state that there was evidence and testimony to convict Gallagher. In fact, you can see the picture yourself and read the transcript of the texts the police found in his phone
, "I got him with my hunting knife". The book "Alpha" explains it better, but Trump meddling (political tampering link) and a tainted jury plus members of the original team who flipped to protect the SEAL community made for reasonable doubt. I'm quoting Gallagher here, and it's in the OP CNN story.
"If the president hadn't intervened in any way? No, I believe I'd be in prison for life,"