Future Serial Killer?

Does every parent worry that their daughter might someday become a hooker or their son a serial killer? In my case, I guess I'm now worrying that my daughter might be the serial killer.............. Have you seen all of those movies they made several years ago where they highlighted some of the major serial killers in history? Each movie was named simply "Dahmer", "Gacy", "Gein", etc. Well, in almost all of them you hear about the early warning signs of serial killers and how at very young ages, many of them were fascinated by inflicting pain on animals. Lili has this book called "DOG" (see pics above).....in fact, she has 3 of copies of the same book. We keep one upstairs, one downstairs and one in a special drawer for safekeeping. Lili absolutely LOVES this book! She brings it to us to read to her at least 10 times a day. On some of the pages there are "sliders" to make the dogs head shake or their tail wag, etc. For some reason, Lili HATES the dog that shakes its head. She has now ripped its head off of both the upstairs copy of the book and the downstairs copy. She also found the secret copy and tried to rip that dogs head off. Luckily, we caught her in time to save the poor mutt. Now when we get ready to read the book, she quickly skips over to the page where the dog is supposed to shake its head and points to the headless puppy's body. She looks at us so innocently...as if she has no idea what happened to the poor puppy. As you can see from the last picture though, Lili knows exactly what happened to the puppy. His head landed in the toilet (please excuse the "ring"......I scrubbed that bowl clean this morning)! Should I be concerned?!?!?!