The DAP’s Lim Kit Siang wants Datuk Seri Najib Razak to guarantee the safety of P. Balasubramaniam to return home, following the latest allegation by the private investigator that he had met Najib’s brother Nazim as part of the deal to leave the country and retract accusations linking the prime minister with the murder of Mongolian Altantuya Shaariibuu.