MUMBAI: The Anti Terrorist Squad (ATS) of Mumbai Police interrogated the Railway Protection Force (RPF) constable, Chetan Singh, accused of killing four people, including a 57-year-old assistant sub-inspector (ASI), onboard Jaipur-Mumbai Express train, officials said on Thursday.
According to officials, Chetan, who is presently in the custody of the Mumbai Government Railway Police (GRP), was grilled for questioning by the ATS for hours.
