Mak returned from retirement in July 2012 when he was appointed
Secretary for Development in the inaugural government line-up of
Chief Executive CY Leung. Revelations immediately surfaced about a cross-leasing scam in which Mak allegedly fraudulently claimed housing allowance for five years from 1985, while a civil servant. The incident led to his arrest by the ICAC and his resignation on 12 July 2012, twelve days into his appointment. On 17 October, Mak was formally charged, jointly with assistant highways director Tsang King-man, with conspiring to defraud the government, to the personal benefit of HK$445,000. Mak was replaced as Secretary for Development by
Paul Chan, a former lawmaker in the Accountancy
functional constituency. ==Honours==