Obado "orchestrated a crippled to destruct Otieno", Judge Cecilia Githua said speechmaking retired her ruling, which was broadcast unrecorded connected television.
He "supplied motive, instigation and funds to concern the transgression enterprise".
Obado's erstwhile idiosyncratic adjunct Michael Oyamo "facilitated execution" and erstwhile region clerk Caspal Obiero "ensured logistical enactment and concealment to debar detection of the offence", the justice added.
The 3 are present successful custody up of the sentencing.
"We are blessed with the conviction. We judge that justness has astatine past been served to Sharon," a lawyer for the victim's household said.
News of her execution gripped Kenyans astatine the clip aft a writer with the Nation Media Group, Barack Oduor, said Otieno had contacted him astir her matter with the then-governor.
The 2 met and were past kidnapped but Oduor said helium managed to flight from the speeding car.
Two days aboriginal Otieno's assemblage was discovered with grounds that she whitethorn person been raped, and stabbed successful the neck, abdomen and back.
The journalist's eyewitness relationship of the abduction became a important pb successful the investigation.
The constabulary traced the conveyance utilized by the abductors.
Its tracking instrumentality had been deactivated connected the time of the alleged abductions, and reactivated the pursuing time successful a "well-calculated determination by the killers to conceal the question of the conveyance successful question", the main authoritative astatine the time, Noodin Haji, said successful a 2018 statement.
The probe established that an "intimate relationship" had existed betwixt Obado and Otieno, which "subsequently led to a gestation with the deceased that the politician was unhappy about", helium added.
In 2018, Obado had said helium had thing to bash with the murder. His lawyer told the BBC that the matter was wide acknowledged and determination was nary shame oregon malice.
But the tribunal rejected this version.
During the trial, the prosecution called 42 witnesses and leant heavy connected circumstantial grounds to beryllium that the ex-governor and his 2 co-accused had worked unneurotic to put Otieno's killing, Kenya's Star paper reports.
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