Although early media reports attributed the shootings to a desire for revenge on the part of Harris and Klebold for bullying that they received, subsequent psychological analysis indicated Harris and Klebold harbored serious psychological problems. Harris and Klebold were never diagnosed with any mental disorders, which is overwhelmingly uncommon in mass shooters. According to Supervisory Special Agent Dwayne Fuselier, the FBI's lead Columbine investigator and a clinical psychologist, Harris exhibited a pattern of grandiosity, contempt, and lack of empathy or remorse, distinctive traits of psychopaths that Harris concealed through deception. Fuselier adds that Harris engaged in mendacity not merely to protect himself, as Harris rationalized in his journal, but also for pleasure, as seen when Harris expressed his thoughts in his journal regarding how he and Klebold avoided prosecution for breaking into a van. Other leading psychiatrists concur that Harris was a psychopath.