@marciosmg
Don't kill him straight away once you find him in 3-2. Release him, finish 3-2, then when you go back to Nexus, confront him and kill him. That way you'll be able to salvage his armour without worrying about Weight Limit.
You should get a hint about Yurt's appearance on Nexus, when you go back from 3-2, and find two previously unknown NPC's lying dead on the first floor. Yurt will be there, hidden in a small crevice on the right side of the first floor.
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