The document discusses two theories about the link between violent films/media and violent behavior in children: 1) Theory 1 is that exposure to violent horror videos leads to violent behavior. However, there is conflicting evidence that while a violent movie was rented to the house, there is no evidence the boys watched it or mentioned it to police. 2) Theory 2 is that a violent social/family background leads to a preference for violent media and propensity for violent behavior. There is more evidence supporting this theory, as both boys came from violent backgrounds and the movie was never proven to be a factor. The conclusion is that the evidence supports that the boys' violent actions were due to their violent upbringings