I have the following info:
"The Kremlin says Putin has personally guaranteed the humane treatment of those who surrender. Other high-profile Russian politicians have publicly called for them never to be exchanged, or even for their execution."
This is from a Reuters Article dated today, similar to this AP article. LINK:
The DPR didn’t fight these scum for eight years just to see them handed back to Ukraine...humane treatment means a speedy trial and then a quick execution.
Foreign fighters may escape hanging but likely face twenty years of hard labor.