Five police officers accused of killing Boko Haram’s founder, Mohammed Yusuf, while in their custody have been reinstated.
A police oversight body disclosed this on Monday.
The freed officers were charged with committing a terrorist act and unlawfully killing during days of unrest in the northeast city of Maiduguri in July 2009.
A judge in Abuja had in December 2015 acquitted the police on the grounds that the prosecution could not establish a case against them. The ruling attracted little publicity at the time.
Last week, 475 suspected Boko Haram members were released from custody after it was found there was not enough evidence to prosecute them, at mass trials of suspects at a military facility in central Niger state.