Inspector Amarjit Singh, SHO, Verowal, has been dismissed with immediate effect for letting free a proclaimed offender (PO), Gurpreet Singh Gopi, who was responsible for killing an ASI in Kapurthala five days ago.Gurpreet, a robber, had hit a police naka party with his speeding car in Kapurthala in which ASI Suridner Singh was killed and constable Harpal Singh received serious injuries.SSP Manmohan Kumar Sharma issued the order of dismissal of SHO Amarjit Singh here today.The police said Gurpreet Singh of Nagoke village was facing trial under the NDPS Act. He went absent from the court proceedings and was declared PO by the local court of the Additional District and Session Judge.Gurpreet was nabbed about two months back. Amarjit Singh, SHO, let him free without bringing the matter to the notice of the higher authorities.