<P> Wright and Hensley (2003) named three recurring themes in their study of five cases of serial murderers: As children, they vented their frustrations because the person causing them anger or humiliation was too powerful to take down; they felt as if they regained some control and power over their lives through the torture and killing of the animals; they gained the power and control they needed to cause pain and suffering of a weaker, more vulnerable animal--escalating to humans in the future . </P> <P> In a study of 45 male prison inmates who were deemed violent offenders, McClellan (2003) found that 56% admitted to having committed acts of violence against animals . It was also found that children who abused animals were more often the victims of parental abuse than children who did not abuse animals . </P> <P> In a 2004 study, which considered not one - off events but patterns of repeat violence, Tallichet and Hensley found a link between repeated animal cruelty and violence against humans . They examined prisoners in maximum or medium security prisons . However, over-generalizing possible links between animal violence and human violence can have unwanted consequences such as detracting focus from other possible predictors or causes . </P> <P> Enuresis is "unintentional bed - wetting during sleep, persistent after the age of five". The bed - wetting must continue twice a week for at least three consecutive months . </P>

Which is not a component of the mcdonald triad