"While I did get weakened, I felt like not all of my powers were gone. Some of it was still left inside me and if I concentrated enough, I might be able to get the powers back… however… those bastards… my so-called family members…"
According to Alex, after he was saved, he was constantly hunted by a group of strong people, his uncle being one of them. Maybe because of his bandage and all, his uncle failed to recognize him, and started attacking for no reason.
Wasn't just the uncle though, their sons and daughters also were included in that. He was blind, not deaf. He clearly remembers the voices of his cousins and uncle. Maybe a mistake could be made with one voice, but multiple voices? Nope. No way it was a mistake.
