Mate was found dumped in Limuru near St Paul’s University by a lorry driver on Thursday night, who took him to the Gigiri Police Station.
He was then taken to the Aga Khan Hospital where he is undergoing a medical checkup, according to police.
“He seems ok, but we found it necessary to have him examined in hospital,” Nairobi Police Chief Benson Kibue said.
Kibue said detectives will interrogate him as part of investigations into his mysterious disappearance from a Nairobi Hotel on Monday where he had been attending a meeting.
“He is key in the investigations, and since he is able to talk, we are sure of getting more information from him,” Kibue said.
Police have intensified a manhunt for his abductors after charging a CID officer with his kidnapping on Thursday.
Nicholas Muriuki Kangangi who is based at the Pangani Police Station’s CID department appeared before the Chief Magistrate’s Court at Milimani, Nairobi where he denied the charge of abduction with intent to unlawfully confine the Embu Speaker.
The prosecution applied that Kangangi be remanded at the Kilimani Police Station for two days as police continue with investigations.
The defense however opposed the prosecution’s application, saying that the accused had not interfered with the probe.
Magistrate Peter Ndwiga denied the prosecution’s application and ordered that the accused appear before the investigating officer at the Kilimani Police Station for further investigations.
The magistrate questioned why the officer was not arraigned in court within 24-hours after his arrest, saying his constitutional rights had been violated.
Kangangi was released on a Sh100,000 cash bail and ordered to appear in court on Monday next week for further orders before the case is heard on July 9.
Kangangi was allegedly scheduled to meet Mate on the day he disappeared from a Nairobi hotel.
Mate’s colleagues from the Assembly have claimed that he went missing after a telephone conversation with the CID officer.