This Day in Nigeria, 8th June 1998: Abacha Dies.

General Sani Abacha (20 September 1943 – 8 June 1998) was a Nigerian military dictator and politician. He was the de facto President of Nigeria from 1993 to 1998. His regime was tied to human rights violations and allegations of corruption
Abacha died in June 1998 while at the presidential villa in Abuja. He was buried on the same day, according to Muslim tradition, without an autopsy. This fueled speculation that foul-play was involved and that he may have been poisoned by political rivals via prostitutes. On the contrary, Nigerian military rulers cited his cause of death as a sudden heart attack.
It is known that he was in the company of six teenage Indian prostitutes imported from Dubai. It is thought that these prostitutes laced his drink with a poisonous substance, making Abacha feel unwell around 4:30am. He retired to his bed and was dead by 6:15am.