Complex sentence: He eventually left the NSO without official leave to study Law in 1979, he was able to do this during the handover period between the outgoing Director General, Colonel Abdullahi Mohammed and the incoming Director General, Umaru Shinkafi.
Split into simpler sentences: He eventually left the NSO without official leave to study law in 1979. He was able to do this during the handover period between the outgoing director general, Colonel Abdullahi Mohammed and the incoming director general, Umaru Shinkafi.