if it was some1 killing maybe he/she is doing it because they are trying to get cats off the streets because so many get killed very year or go missing because they are let out maybe they are trying to put a stop to it by killing cats and by that people wont wanna letb there cats out in fear of them beign killed...are you guys in u.s or canada just in case so i can tell naighbours ect although i have no clue where you live lol