 He was led back to the Catholic faith, most probably by the preaching of St. Peter Martyr, joined the Order of Preachers, then recently established, and laboured zealously for many years among the heretics of Upper Italy.After the martyrdom of St. Peter he was made inquisitor for Lombardy and the Marches of Ancona.Being enraged against him, and yet unable to put him to death, the heretics finally succeeded in having him sent into exile.