Jailbirds are being wrongly released from prisons at the rate of nearly one every week.
A total of 505 criminals, including at least one murderer, sexual offenders and other violent lags, have been put back on the streets by mistake over the past 10 years, say figures obtained using under-threat Freedom of Information laws.
In one incident Martynas Kupstys, 25, was let out of HMP Lincoln while on remand for murder in August last year.
