KUALA LUMPUR, June 5, 2018 (News Wires) — Anti-corruption investigators questioned the wife of former Malaysian Prime Minister Najib Razak on Tuesday about alleged theft and money-laundering involving the 1MDB state investment fund, as officials announced a probe into other suspicious multibillion-dollar transactions under Najib's leadership. The prosecution of Najib and his wife Rosmah Mansor over the 1MDB scandal, which helped lead to Najib's stunning ouster in May 9 national elections, could be sped up with the government's appointment Tuesday of a new attorney-general. The appointee, distinguished lawyer Tommy Thomas, is the first person from outside Malaysia's Malay majority to hold the powerful position in more than half a century. His Najib-appointed predecessor had stifled investigations. Rosmah, accompanied by her daughter and son-in-law, didn't speak to reporters as she was escorted into the Malaysian Anti-Corruption Commission office, where she was questioned for three hours. She was summoned nearly two weeks after Najib was questioned twice by the agency. In another blow to the former first couple, their lawyer M. Puravelan told The Associated Press that he is no longer representing Rosmah and Najib. He said another prominent lawyer Yusof Zainal Abideen had also withdrawn. He said they didn't quit because of disagreement over legal strategies for the 1MDB case but declined to elaborate.