When I first started to read the case beyond the newspapers at the time of the murderers I did have one big reservation. I couldn't see Bamber killing them all just for money when he knew that he would be rich one day and had a very wealthy elderly grandmother who was leaving him a small fortune! His life was comfortable and a rich future assured!
Once I started reading about Bamber's character and his "it's important to be rich when your young" selfishness, I realised he was just too greedy to wait a few years. Add to that his hatred of being controlled and kept poor (in his eyes) by his parents and their 'intolerable expectations' that he should actually work for a living, I could see what a greedy, narcissistic psychopath he actually is!
With that major reservation assuaged, the mountain of circumstantial evidence against Bamber and the proof positive (IMHO) that Sheila would not and could not have committed those murders, left me 100% certain Bamber's is a safe conviction.