E. g. Grandpa is a doctor. My brother is a a policeman.

爷爷是医生。哥哥是警察。

youdao

On 24 October, Marine Cpl David O'Connor, of 40 Commando, and Army medic Cpl Channing Day, of 3 Medical Regiment, were shot in Nahr-e Saraj district of Helmand province in a suspected insider attack by an off-duty Afghan policeman.

BBC: UK soldier killed in Afghanistan 'insider attack'

Pte Wroe, 18, was one of two soldiers killed in Helmand's Nahr-e Saraj district by a "rogue" policeman in September.

BBC: The ceremony inside Golcar Royal British Legion