More than 200 former Dundee police and emergency staff have been questioned over the 1968 death of Stobswell baby Colin Blair.
Investigators have scoured papers from the time in a bid to find the people who tried to save the infant at a flat in Arbroath Road.
Colin died aged just six weeks in November 1968, despite the efforts of police officers and ambulance staff.
The incident was initially treated as non-suspicious but, as reported on Wednesday (link), Tayside’s major crime review team is re-examining the tragedy after receiving new information.
Efforts have been hindered by the fact that no records of local ambulance crew members from the time survive.
One retired Dundee ambulance driver now in his 70s was contacted near the start of the force’s new probe in April. He had been traced through a 1960s newspaper article, and has been asked if he knew other ambulance and police officers from the time.
The cause of death was recorded as inhalation of vomit and intercranial haemorrhage.
The team is tracing witness statements and other relevant documentation from the incident. An exhumation could be ordered if officers suspect foul play.
Retired former Tayside Police Superintendent Craigie Fisken said: “Cold case reviews started in America after they found that people who weren’t willing to speak at the time were willing to speak 20 or 30 years afterwards.”