From Halopedia, the Halo wiki
When he met Adriana-111, he threw his handgun away to show that he was not a threat. It is presumed he was left behind after Adriana-111 left him to think about what he was doing and the Rubble made the slipspace jump without any further mention of him. Presumably he was killed either by the Covenant, lack of air or the eventual cold of space. It is possible however that he sent out a beacon and was rescued by members of the Rubble and made the jump on board Habitat Exodus safely with the rest of the Rubble's population.
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