The suspect, Abshar Ismael, alias Abu Arsad, who was arrested in Barangay Carbon, Isabela City, was involved in other Abu Sayyaf abductions such as those of teachers, students and Fr. Rhoel Gallardo in Tumahubong, Sumisip, Basilan in March 2000, said Brig. Gen. Reymundo Ferrer, commander of the Armys 103rd Infantry Brigade.
According to an intelligence official, Ismael is one of the followers of Abu Sayyaf leader Isnilon Hapilon.
Among the Palawan hostages were Filipino nurse Ediborah Yap and American missionary couple Martin and Gracia Burnham. Roel Pareño