A letter addressed to Giblini's mother was turned over to detectives by the family. Handwriting experts confirm its authenticity.

Psychiatric document interpretation shows an erratic writing style. According to Dr. Kaiser, of the INTERlock Document Laboratory, the letter was written in one sitting, without interruption. Throughout the letter Giblini refers to a coming tornado. Dr. Kaiser states, "Frequent use of a storm metaphor indicates that the subject will act on the aggression seen in the letter."

• View text of letter
• View hand-written version of letter