Police arrest 61-year-old man over 1983 murder of Sydney nurse Mary Louise Wallace Homicide Squad detectives have charged Robert Adams, pictured, with the murder Sydney nurse Mary Wallace, who disappeared from a North Shore hotel 30 years ago. POLICE say they have "comprehensive" evidence against 61-year-old man Robert Adams arrested over the alleged murder of a Sydney nurse three decades ago. Mary Louise Wallace, 33, went missing from Sydney's north shore in the early hours of September 24, 1983. On the night she disappeared she had dinner and drinks with nursing colleagues at the Alpine Inn, in Crows Nest, before leaving with a man who had offered her a lift home. Vanished in 1983 and never seen again: Mary Louise Wallace. Robert Adams pictured in 1976 at the inquest into Mary Wallace's death after a night out at the Crows Nest Alpine Inn. Ms Wallace was never seen again and her body was never found. Police from the Unsolved Homicide Team arrested Robert Adams at Gladesville today over the suspected murder. Detective Chief Inspector John Lehmann said the arrested man was known to police and had been the subject of intensive investigation. "The evidence against him is quite comprehensive, which we'll be putting before the court," Det Chief Insp Lehmann told reporters at police headquarters at Parramatta. He said police would put physical, forensic and DNA evidence before the court as well as witness statements he labelled "very important to our brief of evidence." An earlier police search for clues at Lane Cove National Park. Robert Adams is whisked away from his address in Gladesville for questioning today. The arrest comes after more than 30 years of investigations into the disappearance, including a coronial inquest in 2010 and excavations at Lane Cove National Park three years ago. Homicide Squad Detective Superintendent Michael Willing said police would continue searching for Ms Wallace's body. Det Chief Insp Lehmann said Ms Wallace's friends and family were glad to hear an arrest had been made. They're very pleased with the result. They know it's just the start of a long court process," he said. He called the arrest a "credit to the investigators who have put in tireless hours and an enormous amount of effort and dedication to this particular case." Police said the arrested man was in the process of being charged and would appear in Parramatta Local Court on Friday.