The last man seen with Sydney nurse Mary Louise Wallace before she vanished told another woman he was a suspect in the case, saying: "You'd better watch out, I might hit you over the head and rape you."
Ms Wallace, 33, was last seen in the early hours of September 24, 1983, at the Alpine Inn at Crows Nest in North Sydney.
An inquest into her disappearance and presumed death has heard she was last seen in the car of Robert Adams, a convicted rapist with a history of violence towards women.
In the Glebe Coroners Court on Wednesday, Susan Holman, a former manager of a kiosk at the Lane Cove National Park, gave evidence that Mr Adams approached her in October 1983.
The New Zealand-born carpenter was employed at the time on the construction of an observation deck at the park.
Mr Adams said he "just went up the road to get rid of $10,000" because "police are investigating my money situation to find out why I have had two new cars in the past four years", Ms Holman told the inquest.
He then said: "You know the nurse that went missing from Crows Nest? I'm on suspicion for murdering her.
"I don't look like I've got a murderous face, do I?"
Ms Holman said he told her he had picked Ms Wallace up and "drove around the corner because I didn't want to drive her home as she lived on the other side of the bridge".
He said he had "flaked out" and when he woke up, his pants were down around his knees.
He later told Ms Holman: "You'd better watch out, I might hit you over the head and rape you".
She said she replied: "Try it and you'll find a knife in your guts."
Later that day he returned to buy an ice cream and offered to fix a mouse problem in Ms Holman's kiosk, before lifting a coffee cup on the counter to reveal a funnel web spider.
In another incident, Ms Holman said, he had grabbed her and rubbed up and down her side before she "wriggled" out of his grasp.
Her partner at the time, Alan Cook, gave evidence thatMs Holman was "distressed, shaken, nervous, scared" after she encountered Mr Adams.
He accompanied her to Chatswood Police Station to report the incidents and accompanied her to work for two days before Ms Holman left the job.
The inquest continues before coroner Paul MacMahon.
Kiosk worker menaced after nurse vanished