From Halopedia, the Halo wiki
After deployment to Ariel, he and Michaels found the body of Charles, the only remaining civilian at the colony. Frost then ordered that the ODSTs split into two-man recon teams. Higgins, along with Campbell, formed one of the teams, and together they scouted the colony's motor pool. They were then contacted by Sergeant Frost, who ordered them to recon the generator room of the complex. Before they left, both of them were killed by two Kig-Yar wielding energy cutlasses.
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