A wrongly-convicted prisoner who served time with Jeremy Bamber has claimed he is innocent on the 30th anniversary of the White House Farm murders.

Michael O'Brien, who was imprisoned for eleven years for the Cardiff newsagent murder in 1987, has written a guest blog post for a website run by supporters of 54-year-old Bamber, suggesting that the convicted murderer "stuck out like a sore thumb".

Bamber was convicted in 1986 of the murder of his parents, sister and her two sons in Tolleshunt D'Arcy,but has long protested his innocence.

The Essex farmhouse at Tolleshunt D'Arcy near Maldon where a family of five was found dead with gunshot wounds in August 1985. Jeremy Bamber is accused of murdering five members of his adopted family
White House Farm at Tolleshunt D'Arcy near Maldon where the family of five was found dead with gunshot wounds in August 1985

With today marking the 30th anniversary of the deaths, O'Brien writes: "I met Jeremy in Long Lartin prison between 1989 -1996 and it was so obvious that he did not fit in to prison life.

"He stood out for me, and he seemed lost just like I once was when I first went to prison. I knew something was not right with his case and believed in his innocence from the start.

"It was a gut feeling I had about him and Jeremy was different to the other prisoners.

"The case was the most important thing to him, and proving his innocence was the main thing on his mind just like it was with me.

"They say you can spot an innocent man a mile off and they stick out like a sore thumb—Jeremy was certainly in that category.

Jeremy Bamber is jailed for life on October 27 1985 for the murder of five members of his family. He was jailed for life after being convicted of shooting dead his mother, father, sister and twin nephews at the family farmhouse in Tolleshunt D'Arcy, Essex
Jeremy Bamber

"Wrongful convictions have a habit of leaving the innocent suffering from post-traumatic stress disorder and they may not even know they are suffering from it. I thought I was OK, however experts soon found out that I was far from that.

"Being in prison for a crime you didn't commit leaves many scars and it can only be described like a roller coaster ride.

"One minute you are angry and you feel you can fight whatever obstacles are placed in your way, and the next you are in total despair.

"Depression seeps into your mind, overwhelming you.

"The only thing I had on my mind 24 hours a day was to fight the injustice and I lived and breathed the case just like Jeremy is doing now.

MURDERED: Nevill and June Bamber. Mass murderer Jeremy Bamber who shot and killed five members of his family at Tolleshunt DÕArcy, has been granted an appeal hearing
Nevill and June Bamber were killed by Jeremy Bamber

"I do not know whether I would have had the strength that Jeremy has got if I had still been in prison for almost 30 years like he has.

"However, one thing I do know is that I would have fought as hard as I could to obtain justice in the same way as Jeremy has done, and he has to continue fighting until he has been proved innocent because that is exactly what he is.

"When I found out I was going to be released, I had a lot of anxiety not knowing what to expect in the outside world and this was after eleven years.

"Looking at it from Jeremy's perspective it would be quite frightening with the way society and the outside world has changed in the 30 years he has been incarcerated.

Sheila, Daniel and Nicholas Caffell was murdered by Jeremy Bamber. He shot and killed five members of his family at Tolleshunt D'Arcy
Sheila, Daniel and Nicholas Caffell was murdered by Jeremy Bamber

"Fear of the unknown and not knowing how he will adjust back into society can also be a daunting thought.

"I felt this too, and also wondering what reception you are going to get from the general public. These are just some of the things, which will be going through Jeremys mind.

"We must not lose sight of the fact due to the injustice that has been laid on Jeremy, he has suffered further by losing his family: Nevill, June, Sheila, Nicolas and Daniel.

"He has not been able to grieve for the loss of his family, as he should have been able to do.

"My thoughts are with Jeremy's family who lost their lives in tragic circumstances and also with Jeremy who not only lost his family but also his freedom, which has been stolen from him.

"I believe a miscarriage of justice does not lay doormat, Jeremy's case is going to rise up and haunt all those who have taken part in this injustice and the truth will come out."