In April, Guaimar's representative, Duke Manso II, was forced to flee Amalfi, which began attacking Salernitan shipping.
According to Amatus, the leader of the conspiracy to remove Guaimar was Pandulf, who offered to reward with benefices any who would help him become prince.
When the Amalfitans attacked Salerno from the sea, the Pandulf and his three brothers were ordered to defend the shore.
Guy apparently negotiated the surrender of the citadel, promising to spare the lives of Pandulf and his co-conspirators in exchange for his nephew, Gisulf.
The Normans did not feel bound by this agreement, and hunted down and killed Pandulf and thiry-five others to avenge the thirty-six wounds found on Guaimar's body.