Wayne Whitley (born 15/05/1974) who was serving a life sentence for a series of violent armed robberies committed in 2004, absconded from HMP Kirkham on 19 July 2014 and has not returned since.
He is described as a black man, aged 40, of slim athletic build. It is unknown what he was wearing when he left prison.
He has links to areas across Greater Manchester.
Detective Inspector Robert Cousen from GMPâ€™s Serious Crime Division, said: â€œWhitley escaped from lawful custody on 19 July 2014 and we are making every effort to find him.
â€œHe is not to be approached by members of the public, but if anyone sees him or knows of his whereabouts, please contact GMP on 101 immediately.
â€œIf you would prefer to pass on information anonymously, then you can do this by calling Crimestoppers onÂ 0800 555 111.
â€œI would also urge Whitley to hand himself in at his nearest police station and to remind people that if anyone is found to be assisting or harbouring Whitley, they too will face being arrested and a possible prison sentence of their own.â€