And when Peter saw it he addressed the people: “Men of Israel, why do you wonder at this, or why do you stare at us, as though by our own power or piety we have made him walk?
Acts 3:12

Peter addressed the "Men of Israel", but he was also speaking to himself. He was complicit in the false accusations made against Jesus and in his execution because he didn't speak up when he had a chance. In v14, he says "You denied the Holy and Righteous One." I don't think he could say that and not remember his own denial of Yeshua.