Luke Mitchell takes lie detector over Jodi Jones death
14 January 2013 Last updated at 14:53 GMT
A video of Luke Mitchell, who was convicted of murdering his 14-year-old girlfriend Jodi Jones almost 10 years ago, has been posted on YouTube.
The film shows Mitchell denying the murder while taking a lie detector test in prison.
He was jailed for murder in 2005 and has always protested his innocence.