The police overtook him. OR: He was overtaken by the police.
Comment:
The police is non-topic and subject, and therefore there is an inverse marker: not the topic ('he/him') is agent, but a newly introduced referent ('the police'). This active and inverse sentence contrasts with this passive sentence:
Kii-atimikaashoow par lii polis. 'He was overtaken by the police.'