About 6.45pm on 30 October 1980, Lisa, who was 12 years old at the time, attended the local basketball courts on Throssell Street in Collie with a friend. Later that same evening, about 8.45pm, she went to a nearby pizza shop.
Lisa left the vicinity of the pizza shop about 9pm and was last seen crossing a railway line to Forrest Street, before entering a yellow panel van, believed to be a Holden 1970 to 1978 model. She has not been seen or heard from since.
New information has since come to light. An eyewitness has told detectives she saw Lisa talking to a male, who Lisa appeared to know, at the basketball courts the same evening she went missing. The witness had seen this male at the courts about three times previously.
Investigators are today releasing a description of that male, who may be able to assist police with this investigation, in the hope it may jog someone's memory and that person or the man himself, may come forward to help solve this case.
That male is described as approximately 18 to 20-years-old at the time and tall with curly hair. It is believed he was leaning on a yellow Holden panel van during that conversation with Lisa. Detectives have been unable to identify the male described and are asking him to come forward.
Additional, unrelated investigative lines of inquiry have led detectives to search a number of wells in Noggerup (south of Collie) for Lisa's remains. There was a yellow vehicle sighted in this area around the time she went missing.
Detective Senior Sergeant Greg Dowding from the Cold Case Investigations Unit is urging anyone who knows anything to come forward and help solve one of WA's most notorious and oldest mysteries.
"Someone out there knows something which could be the vital information we need to solve this.
"Tomorrow marks an unwanted 45-year anniversary of Lisa's disappearance but all these years later, WA Police remains committed to finding out what happened to Lisa and providing some solace for her family.
"I would just like to say that someone out there knows what happened to Lisa and can tell us where she is. Unfortunately, Lisa's father, Brian MOTT passed away not knowing what happened to his daughter.
Lisa's surviving family need to be able to say goodbye, so I ask that person to come forward or make that phone call.
"Spending decades not knowing what happened to your child is every parent's worst nightmare and WA Police is unwavering in our pursuit to provide those answers."
The State Government has a $1,000,000 reward on offer for information which leads to the arrest and conviction of the person or persons responsible for Lisa Mott's death.
Anyone with information which may assist the investigation is urged to contact Crime Stoppers on 1800 333 000 or report online via www.crimestopperswa.com.au . People reporting information to Crime Stoppers may remain anonymous if they wish.
