Serial killer

who Can be the killer O_o
The blood of the victim is the only i can do good (i guess)
The soldier has a problen in eyes: it reflects the map thats not it and its strange see a tree in a house
i suck in ballons ¬¬

It looks like the solider is stabbing her with his groin-sword.

the sword is cleved and the killer is hidden (…)