A prison officer has been dismissed for gross misconduct after being caught making friends with inmates on the social networking website Facebook.
Nathan Singh, 27, who worked at HMP Leicester, was found to be associating with serving and former prisoners.
A prison service spokesman said: "We take inappropriate relationships with prisoners very seriously."
He added the majority of prison service staff were "honest, hardworking and professional".
The spokesman continued: "Following an investigation, a prison officer from HMP Leicester was dismissed in January for gross misconduct.
"He had been associating with serving and former prisoners, outside the course of his employment and without authority.
"We carry out thorough checks when we recruit prison officers, looking at character and criminal records, as well as nationality and identity.
"We work to create and support a culture which values integrity above all and rejects corruption and dishonesty."