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Perry Kouroumblis as a teenager.Credit:

The arrest of a suspect for the 1977 murders of Suzanne Armstrong and Susan Bartlett in their Easey Street home will most likely lead to a ferocious forensic examination of a science that did not exist at the time of the crime − the capture and examination of DNA.

It was 10 years after Easey Street that DNA profiling was first used, leading to the conviction of Colin Pitchfork for the rape and murder of two 15-year-old girls in neighbouring Leicestershire towns.

What we do know is police allege there has been a match between a sample taken at the Easey Street crime scene and the man arrested, Perry Kouroumblis, who was a teenager at the time and lived a few streets away. What we think we know is the DNA result, as a matter of routine, will have been confirmed from multiple samples.

Kouroumblis moved to Greece in 2017, shortly after he was asked for a DNA sample to eliminate him from the investigation. At first, he agreed but reneged, flying to Athens not long........

© The Age