The city police probing the killing of senior investigative journalist Jyotirmoy Dey, are likely to question former Congressman and oil mafia kingpin Mohammed Ali, currently lodged in a local jail.

Dey (56), who had extensively covered underworld and crime for over two decades and was working with English tabloid 'Mid-Day', was shot dead in a broad daylight on Saturday by four unidentified bike-borne persons in suburban Powai.