It must take a lot of strength to strangle a husky dog, even with a lead I don't think it would be quick or easy with such a wide, thick-skinned and fur covered neck and the weight of the dog resisting against the person. The person would have to have quite a significant height advantage over the dog, and strength, to maintain that pull on the lead. I rather think it was killed by the hanging, or was suffocated first and hung for staging.
Presumably Caroline and Babis heard Bruno barking during this event, as did the neighbour through thick walls, but stayed in the bedroom and didn't call police from the phone on the nightstand. I know when I had my babies I became very used to sleeping with an ear out for the slightest noise.
I note also the neighbour didn't say she was
woken up by the barking, she just said she heard the dog barking earlier in the night and presumed it was fighting the cats. So was she awake already at 4:30/5am, or was it much earlier in the night, before she went to sleep, perhaps? If she was awake and listening to the dog, in the quiet early morning hours, I think there is a good chance she would have heard the couple screaming.
"Babis said: “I heard my wife screaming for help. We screamed not to be hurt. The baby was crying, my wife was crying and someone or some people were looking through the house to find more money and jewellery.
“They left the room and I couldn’t hear my wife’s voice any more.” Conflicting reports say she was strangled with a pair of trousers or suffocated with a pillow."
Then there is the point about the method of killing, strangulation/suffocation, being the same for Caroline and Bruno, time-consuming, and not your common ruthless assassin-style, as the hanging dog might depict. If the dog was thrown over the railing whilst alive, to hang, it seems to me it could be a decision of convenience - distance from the act in one respect, it being done by the lead and railing, no bloodshed on clothing, and possibly nothing else available. But it creates a scene of horror, and why would the killers care about effect? It wasn't done in front of the owners to terrorise them.
Lastly, Caroline and the dog were killed with items available in the house. Presumably Bruno was not wearing his lead in the house, and the killers had to go and find it in the dark after breaking in, giving longer for the barking to wake everybody up. If they brought bindings for the adults, and obviously planned to kill the dog first, why did they use household items (lead, clothing, pillow) to kill? A gun shot would have been quick, and they could have brought a silencer since it was planned.
Oh, maybe not last, how do you break a security camera without being recorded on it first?
All MOO