one thing that does confuse me is that if someone was hired to murder the whole family then they must have been told there were 2 children and both were to be killed, why then did they miss one child and not shoot the other in the head as they did with the adults to ensure they were dead
leaving either of the children alive meant that they will inherit any family money so if it was done to get the inheritance then a poor job was done
also it cannot have been done by somebody who was watching the family as they would have also seen 2 girls and thus would have made sure to find and kill everybody in car
I doubt the 4 year old was spared, she was just not spotted in my opinion as they were prepared to batter a 7 year old in the head to kill her when they may have run out of bullets, the 4 year old would have received the same fate if it was known she was in the car
Or they knew there were 2 children, but French cyclist interrupted them so hitman had to shoot cyclist, ran out of bullets so hit 7 year old round head, couldn't see 4 year old so left in a panic? Bungled hit