article_snippet.sent: One of the escapees from the 500-inmate jail, is violent killer Robert Donovan, 57. 
article_snippet.sent: Murderer Robert Donovan, 57, left,  is considered so dangerous that the public have been advised not to approach His.
article_snippet.sent: Among those who failed to return after a temporary release in June 2010 is 57-year-old Robert Donovan, who was convicted of stabbing a West End theatre manager to death.
article_snippet.sent: Police considered 57-year-old Robert Donovan, who was convicted of stabbing a West End theatre manager to death so dangerous that 57-year-old Robert Donovan, who was convicted of stabbing a West End theatre manager to death should not be approached by the public, but not a single appeal was made for help catching 57-year-old Robert Donovan, who was convicted of stabbing a West End theatre manager to death until June last year.
article_snippet.sent: Donovan, who was jailed indefinitely at the Old Bailey in December 1974, had been in open conditions for less than a year when 57-year-old Robert Donovan, who was convicted of stabbing a West End theatre manager to death absconded.
article_snippet.sent: 57-year-old Robert Donovan, who was convicted of stabbing a West End theatre manager to death was jailed for possessing drugs with intent and Malek Riahi, right, was sent to prison for deception offences.
article_snippet.sent: 57-year-old Robert Donovan, who was convicted of stabbing a West End theatre manager to death has not been seen since 2006 .
article_snippet.sent: 57-year-old Robert Donovan, who was convicted of stabbing a West End theatre manager to death escaped in 2009 .
highlights_snippet.sent: Also on-the-run Robert Donovan who knifed to death a theatre manager .