I just realized this afternoon this trial was on so skimmed through the tweets recorded. This may have been pointed out but an inconsistency seems to be DM himself saying his dad had been "bedridden" after hurting his back but then supposedly being surprised to find his dad "still in bed" late in the afternoon when he came home.
I believe what DM had said that he "threw his back out" about 7-9 months ago and had spent a couple of months in bed at that time. He acknowledged that his father was now ambulatory although he did use the electric scooter to cover the distances in the hangar.