The family of a couple killed by their own daughter "in cold blood" have described their heartbreak, as she was jailed for life for their murders. <br /> <br />Virginia McCullough, 36, poisoned her father John and attacked her mother Lois McCullough with a hammer and a knife. <br /> <br />At Chelmsford Crown Court on Friday she was jailed for life with a minimum term of 36 years. <br /> Report by Kennedyl. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn
