TM could have been still alive and brought his arms to his chest before he died.
That was my thought. After GZ pulled them our he drew them back in to his wounded chest.
He was still alive. GZ said he was talking. I think the arms were under TM and GZ was trying to spread them...in other words...elbows were bent not straight and that’s how he was found. Let’s see a picture. It will help tell the story.