Overview
- Mahad Elmi, 27, left the Category D HMP Springhill near Grendon Underwood overnight between Christmas and Boxing Day.
- Thames Valley Police say he is unlawfully at large after failing to return to the open prison.
- He is described as a black man about 5ft 8in tall, of medium build, with medium-length black hair, a beard and brown eyes.
- Officers advise the public not to approach him and to report immediate sightings via 999.
- Information on his whereabouts can also be shared via 101 or online, quoting reference 43250653119, and he has links to south-west London.