Nigeria, Nov. 13 -- In June 2012, then-President Goodluck Jonathan appointed Sambo Dasuki, a retired army colonel, as his National Security Adviser (NSA). Mr Dasuki's main charge was coordinating the government's response to the terror group Boko Haram, which was emerging as a major national security challenge at the time.

Barely two months after his appointment, Mr Dasuki's office approved the transfer of N270 million of public funds to his family friend Robert Oshodin, a Nigerian furniture manufacturer based in the United States, and his wife, Mimie. Over the three years of Mr Dasuki's tenure, his office would make dozens of transfers of millions of dollars to the couple's bank accounts.

Bank documents reviewed by PREMIUM TIMES indica...