It can seem pretty cute when little Bobby is wrenching the heads off his sister’s barbie dolls, but some of his adorably morbid actions may foreshadow a dark and bloody future. Over the past few decades, psychologists and criminologists have closely studied what it is that makes a killer into a killer. Are killers born with some sort of homicidal gene? Is it drug-related? Childhood trauma? Too many horror movies? A combination of multiple factors can be the problem, and to this day no one can pinpoint the exact concoction of circumstances that influence a child to grow up into a cold blooded murderer. However, criminologists have discovered patterns of behavior and life circumstances amongst the childhood’s of murderers and other hardened criminals. You definitely shouldn’t take your kid’s tantrum as a sign they’ll one day become a rage-filled lunatic; it’s also likely that a disturbed child will show signs that could only be ignored by a complete moron — or the neglectful kind of parent who sprinkles all the ingredients needed to cook up one crazy killer. Here are signs that are indicative of a severely disturbed child who may grow up to murder.