article_snippet.sent: The former trucker, who notoriously targeted prostitutes during his five-year killing spree, has seen his health deteriorate in recent years.
article_snippet.sent: his had a hernia operation in 2013 and was reported to have suffered a heart attack.
article_snippet.sent: The murderer, who is already blind in one eye after a prison attack, was also told  his could lose what remains of his sight within a year due to an eye condition.
article_snippet.sent: his had refused laser eye surgery as his fears laser eye surgery could cause his to lose his vision immediately.