Updated

Colombian police have arrested the former bodyguard of a one-time presidential candidate who was assassinated on a crowded airliner more than two decades ago

Former rebel leader Carlos Pizarro was killed in 1990 when an assailant opened fire on him midflight. His state-assigned bodyguard at the time was hailed as a hero for avoiding a bigger bloodbath by killing the candidate's assailant.

But the chief prosecutor's office arrested Jaime Gomez on Monday, saying he was in on the plot and killed Pizarro's attacker to ensure his silence.

Gomez was still working as a criminal police investigator.

The arrest comes as Colombians re-examine the role of corrupt state agents in several high-profile killings of three presidential candidates and other politicians amid drug-fueled violence two decades ago.