Should Trump pardon those accused of war crimes and murders?

I agree with SSG Brian Grierson, this is a "tricky question".

The roundabout where Blackwater received fire was well known as an ambush area for VBIEDs as well as well as random shooting. It is located about two blocks from the IZ gate which had been bombed several times during the years I worked in Iraq. Also, the Sheriton was located a block from the site which had been bombed and targeted by incoming frequently. I had a Iraqi Policeman point a pistol at me after returning from a run in that same area but decided not to fire. I believe the whole trial was a Kangroo Court. I do think there was a group over reaction. However, in the fog of battle in a urban environment amplifies the noise and confusion. I think they have served enough time. The State Department started pay blood money to Iraqis which many took advantage of murders being blamed on troops and contractors. Opinions vary.......

It's completely up to him, that is his right to pardon or commute them.
Do you feel the same about Bradley/Chelsea Manning?