A suspect closer to home

Geoff Hirst has contacted me to suggest that William Rayner, Liz's father, is worth considering more closely as a suspect. It's certainly true that the murder of a child by a parent is,sadly, not unknown. He points out that there could have been two possible motives - the first that William disapproved very strongly of his daughter's behaviour and a heated argument turned tragically violent. The alternative suggestion is that he may have had an incestuous relationship with her (not unknown in those times) and wanted to dispose of the physical reminder of his actions. I agree that this is possible, but my argument against it is that if there had been some suspicion regarding him, surely he would have been asked to give a deposition before the coroner. The fact he didn't, seems to suggest that plenty people had seen him on the night of the murder, so his whereabouts were not in question.