2015 West African offensive the military's advance. BBC analyst Tomi Oladipo called the victory a major milestone for Nigeria. Boko Haram had held the town since August 2014 when Nigerian troops abandoned the city. The victory came days after Chad President Idriss Deby criticized Nigerian forces for not pulling their weight in the fight against Boko Haram. On election day, Boko Haram militants killed 41 people, including a legislator, in an effort to disrupt voting. After Muhammadu Buhari defeated incumbent president Goodluck Jonathan in the election, the fight against Boko Haram continued. (Jonathan remained in power until May 29.) On April 8, a summit
Goodluck Jonathan court of 13 terrorism-related charges and sentenced to 24 years in jail. In January 2015, Jonathan stated that, due to his refusal to award MEND a higher share of the oil wealth, Okah bombed Abuja with the purpose of assassinating Jonathan. Jonathan's government has largely been described as corrupt. According to "The Economist", corruption flourished under the Jonathan administration, "who let politicians and their cronies fill their pockets with impunity." Large sums of money have been used improperly multiple times, with ₦ 3.98 trillion Naira ($20 billion USD) allegedly going missing and ₦ 398 billion Naira ($2 billion USD) of