I wonder if she was staying at mum and dad's and using dad's ipad??
I am so glad that there is evidence that someone in the bc clan knew his sleeping alibi was a bunch of horsepoo and they were not upfront with the police. While their reputation is probably shot anyway, I am glad there is outright evidence they were a snake in the grass to Allison, mother of their grandchildren. Along with my 4 sister-in-laws, I also have ex-sister in laws, with varying degrees of contact, but their status as my nieces and nephews mothers is sacrosanct, they are family and deserving of the same loyalty as my siblings. I imagine I will have the same or even deeper feeling for the mother and father of any of my grandkids. You can support your son in his (created by himself) time of need while respecting your DIL and grandkids, all it requires is you tell the bloody truth.
As for the other charges, I will be surprised if the interfering with a body is much more than the indignity of dumping her like rubbish. It is so offensive.