PART I—PRELIMINARY
Offences Against Administration of Justice
18. A person who is alleged to have committed an
offence under any of sections 9 to 17 may be tried and
punished in Kenya for that offence if—
(b) at the time the offence is alleged to have been committed, the person was a Kenyan citizen or was employed by Kenya in a civilian or military capacity; or
Territorial jurisdiction - national proceedings
EDIT.