Bianchi was deeply troubled from a young age, with his adoptive mother describing him as "a compulsive liar" from the time he could talk. He would often fall into inattentive, trance-like daydreams where his eyes would roll back into his head. A physician diagnosed the 5-year-old Bianchi with petit mal seizures due to these symptoms. Bianchi was also frequently given physical examinations by doctors because of an involuntary urination problem, causing him a great deal of humiliation. He had many behavioral problems and was prone to fits of anger; his mother responded by taking him to a psychiatrist multiple times, with Bianchi being diagnosed with a passive-aggressive personality disorder at the age of 10. Bianchi's IQ was measured at 116 at the age of 11, but, despite having above-average intelligence, he was an underachiever and was moved twice from schools due to not getting along with teachers. His mother described him as "lazy", and his teachers claimed that he was working below his capacity.