Officials of the Colombo Division Organised Crime Investigations Bureau arrested a suspect for killing Ranjan de Silva, a councillor of the Mount Lavinia Municipal Council.
They arrested the suspect in a sudden raid they carried out in Panadura on Thursday. Ranjan de Silva was the father of Sri Lankan cricketer Dhananjaya de Silva.
Police seized a pistol from the suspect. He was identified as a member of a underworld gang in Colombo.
Councillor Ranjan De silva was shot dead four months ago while he was conversing with several of his friends in front of his house in Moratuwa.
The suspect is having connection with a gang leader called Anju escaped to a foreign country last year.
Investigations are continuing under DIG Lathiff.