Peter Tatchell and three members of his activist rights group called OutRage! Went to Zimbabwe on October 30th 1999 in order to arrest Robert Mugabe of murder, detainment without trial and abuse of gay human rights.
Peter and his activist group that included Alistair Williams, Chris Morris and John Hunt ran up to the Zimbabwean President's motorcade during his private shopping trip.
They grabbed his arm stating, "President Mugabe, you are under arrest for torture. Torture is a crime under international law."
Peter Thatchell was referencing section 134 of the Criminal Justice Act 1988.
Peter then turned to Robert Mugabe's bodyguards and demanded that they called the police. While the four ended up being arrested, detained, Robert Mugabe was allowed to leave.
The OutRage! activists were then taken to court in November in London and pleaded not guilty. The charges against the activists were then dropped.