Fascinated by this case. Have seen the Netflix doco and listened to the bbc podcast which added interesting info about the financial difficulties the Petersens had.
I don’t think he was involved in the friends death in Germany. The PM said she had no head injuries but cranium filled with blood, recent headaches, I think they decided it was a subarachnoid haemorrhage? Which fits. She just so happened to be standing at the top of the stairs when she lost consciousness.
I still just cannot decide whether he killed Kathleen. With the financial difficulties and affairs there was possible motive, he was physically strong enough to have the means to kill, but I found the blood spatter evidence quite interesting especially just the limited physical space in the stairwell to bludgeon someone with a long blowpoke without striking the walls etc with the poke. She was intoxicated with diazepam in her system, I know it sounds batshit but I can’t discount owl theory. The lacerations on her scalp are consistent with a raptor attack, there were many reports of owls taking hats or clipping humans heads in the area, lots of tree cover when you see their garden… it’s not completely beyond the realm of possibility that she was struck by an owl and disorientated and intoxicated struggled up the stairs then fell to the bottom and bled out. From the evidence I’ve seen I definitely feel there is sufficient reasonable doubt.