Curtis Warren has been freed from prison after 14 years and is understood to be back in Liverpool.
The Toxteth native once dubbed 'Target One' by Interpol was released from the maximum security HMP Whitemoor, in Cambridgeshire, on Monday. Liverpool's most infamous gangster is now subject to a strict raft of restrictions including a ban from instant messaging apps WhatsApp and Facebook Messenger, being in possession of more than £1,000 in cash, giving police a day's notice if he wants to use a friend's car and a ban on travel outside of England and Wales without giving seven days notice to police.
Those measures are part of a Serious Crime Prevention Order imposed by the courts after an application from the National Crime Agency (NCA). An NCA spokesman said: "Action against serious and organised criminals doesn't end with a conviction.