Thames Valley Police is re-appealing for the public’s help to find absconder Malcolm Millman.
Officers would like to speak to anyone who has seen him or recognises someone matching his description.
Malcolm MillmanMillman was convicted of rape in 1996 and poses a risk specifically to woman and girls.
Thames Valley Police believes he could be violent and he has previously threatened his victims with a weapon.
Chief Superintendent Zoe Sheard of Greater Manchester Police said: “In the past Malcolm Millman has committed violent attacks on young girls and women and for this reason we believe he may pose a serious risk to the public.
“It is possible that he may be in Greater Manchester and I would like to assure everybody that we are continuing to work alongside Thames Valley Police to do everything we can to find him.
“We are going into Halloween weekend and I know there will be a lot of people out taking part in the festivities but I want to urge everybody to remain vigilant and I advise you not walk the streets alone and always make sure people know where you are.
“If you see this man, please do not approach him but contact the police immediately.”
Members of the public should not approach him but should contact Thames Valley Police on 101.
Malcolm Millman absconded during a day visit to a monastery in St Margarets, Great Gaddesden, Hemel Hempstead, at about 2pm on Saturday (24/10).
He failed to return to Chadwick Lodge, a secure facility in Chadwick Drive, Eaglestone, Milton Keynes, whose care he was under.
Millman has withdrawn a large cash sum from cash points during the weekend and has been using public transport. He may also be booking into hotels or hostels.
Millman is white, of large build, bald with thinning brown hair on the sides, and brown eyes.
He was last seen wearing a brown jacket, purple jumper, grey tracksuit bottoms and blue and white trainers. He also uses a walking stick.
Millman has medical conditions including a heart condition and diabetes so he may be seeking medication.
Det Supt Chris Ward from Major Crime, said: “Thames Valley Police needs the public’s help to find Malcolm Millman.We are also working closely with other police forces and organisations to locate him as soon as possible.
“Millman was convicted of rape in 1996 and we believe he poses a potential risk, specifically to woman and girls.
“I want to urge everybody to remain vigilant. If you see this man, please do not approach him but contact the police immediately
“If any member of the public sees Millman, do not approach him, but call Thames Valley Police on 101 or 999.
Or if you have any information, no matter how small the detail about Millman’s whereabouts then please call police via 101.”
Millman is also known by the following names: Richard Simon Barber, Michael Geoffrey Newman, and Raymond Pilkington.
Millman has links to Kent, Warwickshire, London, Cleveland and North Wales.
If you do not feel comfortable speaking directly to the police then you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org. No personal details are taken, information is not traced or recorded and you will not go to court.