By Benedict Tetzlaff-Deas A twisted former bomb disposal expert has been jailed after he stole nearly £500,000 from his dying father – leaving him with just 48p. David Bickel, 58, took the money over six years from his father Peter, who was battlingdementia. He even pocketed the proceeds from selling his house. Bickel, a dad-of-three from Attleborough, Norfolk, had been given lasting power of attorney over his father’s finances. But his “sustained” thefts eventually meant 17 of Peter’s relations – including three grandchildren, nieces and nephews – missed out on inheritances that he had left t…