I wouldn't even hang the murder tag to this.

If you watch and listen to the vid they followed protocol. They saw what looked like weapons and an RPG, they called for clearance and it was given because one unit called no friendlies in that area and it was again confirmed and cleared by HQ. There is nearly no way they could have known otherwise especially from that distance.

They should not have tried covering it as that implies guilt. They should have simply said it was a tactical error and apologized etc. to make it all smooth over in some fashion.

Watching the vid knowing what they are carrying and doing makes it obvious to us but on the field is a whole other matter.