Gangadhar Pangala (55) was killed in an accident at Baikampady on May 15, while returning from Muloor by his two wheeler when an unidentified vehicle hit him and sped away.
The victim's family had raised doubts about the death.
The main accused Satish Baikampady is still at large and there could be more persons involved, police said.
The CCTV footage in the camera installed in the goods railway station showed a jeep waiting and then knocking down the scooter Pangala was riding.
