Det Ch Insp Amy Keane-Christie, leading the investigation, said: “The information received has led to an arrest of a man who is a new suspect to the investigation, which originally launched in 1983, into Olive’s murder.
“Olive’s family have been informed and are currently being supported by family liaison officers.
“A team of specialist trained detectives are currently dedicated to reviewing and progressing the investigation.”
Ms Keane-Christie said scene guards were in place at “a number of locations” in the town as searches took place.
Anyone with information about the case is asked to contact police.
