Detectives investigating the murder of Rikki Neave put out an appeal for information on BBC television’s Crimewatch on Monday.
Cambridgeshire Police agreed to reopen the case into the six-year-old’s death earlier this year and have built up more of a picture of the youngster’s final hours.
New witnesses have now come forward with fresh information, including sightings of two teenage boys with an oversized child in a pushchair heading for the general direction of a wooded area.
Rikki, who has connections to March, was last seen leaving for school at around 8.30am on Monday, November 28, 1994, from his home in Redmile Walk, Welland, Peterborough.
He is believed to have been wearing grey trousers, a white shirt, black shoes and a blue coat.
Rikki had been seen around the Welland Estate during the day but the last confirmed sighting of him was between 5.30pm and 6.30pm at the Scalford Drive shops on the estate.
Rikki’s body was found the following day in a wooded area off Eye Road, close to Willoughby Court - five minutes’ walk from his house in the Welland Estate.
A post mortem examination concluded that Rikki had died as a result of a compression of the neck – strangulation.
The following day (Wednesday, November 30) officers searching Willoughby Court found Rikki’s clothing – grey trousers, a white shirt, black shoes and a blue coat – in a wheelie bin.
Monday’s Crimewatch programme included a reconstruction of Rikki’s last known movements along with interviews from his mother Ruth and his younger sister.