Police have renewed an appeal for information over a fatal road collision on Christmas Eve on the A14 at Sproughton.
The incident happened at around 10:20pm 24 December when around six horses were seen loose on the road. Four vehicles were involved in a collision with the horses.
Thomas Allen, 23, from Soham was taken to Ipswich Hospital with life threatening injuries. He died on Christmas Day.
Three horses also died as a result of the collision.
A 26-year-old Ipswich man arrested on suspicion of causing danger to road users has been bailed pending further enquiries.
Anyone with information should call PC Allie Cotton at the Serious Collision Investigation Team on 101 or Crimestoppers on 0800 555 111.