Fresh details have emerged about how a man awaiting extradition on a Massachusetts warrant alleging he killed his girlfriend and left her body in a car at the Boston airport escaped from police custody.

Kevin Adam Kinyanjui Kangethe slipped out of a police station cell and jumped into a matatu and escaped towards Thika on Wednesday, February 7 evening, police said.

This prompted a fresh search on him even as four police officers who were on duty were detained over the escape.

Four police officers and a lawyer were arrested over the drama and are helping in the probe into the same, police said.

It has emerged the escape happened as Kangethe met a lawyer at the station at about 5 pm.

According to police, Kangethe had been removed from his cells after the lawyer came to the station and said he wanted to have a word with him ahead of the planned hearing of his extradition case on Friday, February 9.

The lawyer identified as John Maina Ndegwa who introduced himself to the officers as a personal advocate to the prisoner said he wished to talk to him. Ndegwa is among those who appeared for him last week in court.

The officers agreed to his request and removed the prisoner from the cells and took him to one of the anti-crime offices leaving them there.

Other officials argued the meeting should have taken place across the counter at the report office.

After a short meeting, the prisoner escaped by running away and leaving the advocate behind, police said.

At the time of the escape senior police officers there were coincidentally holding a meeting/lecture with all the anti-crime personnel.

The officers who were manning the fugitive said they realized Kangethe had escaped after walking back into the room and found the lawyer there alone.

They raised the alarm and rushed out after seeing Kangethe race towards Thika Road.

Kangethe then jumped onto a matatu that was at the bus stop and asked the driver to take off amid shouts from the officers who were chasing him. It vanished.

Police say they have details of the matatu and efforts to trace the crew and owner were ongoing. Nairobi police chief Adamson Bungei said a fresh search for him began immediately.

The police chief said he rushed to the station when he learned of the escape.