More likely he was just taken captive, since he is recorded by Amatus of Montecassino as entering Melfi again in 1057 to dispute the succession with Drogo's younger brother Robert Guiscard.
More likely he was just taken captive, since he and Humphrey jointly led a Norman army against Argyrus in 1053. Peter is recorded by Amatus of Montecassino as entering Melfi again in 1057 to dispute the succession with Drogo's younger brother Robert Guiscard.