Yes, he should have received some means, it would have been the right thing.
Several others were making money out of the tragedy. In my opinion Colin wrote it in a dignified, unsensational way reflecting on the aftermath and grieving process.
You misunderstand me I think.
Jeremy Bamber slaughtered the most precious persons in Colin Caffell's life, his two young sons.
You seem to be fixated on remuneration from his book. I don't think that was a motivating factor for him in writing it. I think he was far more interested in setting the record straight on the treatment Sheila Caffell had been given by the press.
The murder of his family was a truly life changing event for him and I don't think he needs implicit criticism for writing a book and being paid for it.
I agree with you when you say, "In my opinion Colin wrote it in a dignified, unsensational way reflecting on the aftermath and grieving process."