In one of Victoria’s most brutal unsolved killings, two women in their 20s were stabbed dozens of times in their home on Collingwood’s Easey Street in 1977. Now, after 47 years and examining over 130 “persons of interest”, police have finally made an arrest.

Today, journalist and author of Murder on Easey Street Helen Thomas, on the killings that haunted Melbourne and the suspect – known as “the boy with the knife” – that police overlooked for decades.