Suspected shooter may have written good-bye letter 08/02/2016 6:33 am PDT Comments KCPQ via KCPQ: SEATTLE -- (KCPQ) -- New details have emerged in the deadly shooting that killed three teens and injured one at a party in Mukilteo. The shooting suspect, Allen Ivanov, appeared before a Snohomish County judge in Everett Monday for a probable cause hearing on murder charges. Court documents shed new light on the hours and days leading up to the shooting as does a letter Allen Ivanov's mother shared with their former attorney. “The letter actually addresses everyone that is important to him,” said Kim, who received the family's consent to turn the letter over to authorities because of its suicidal tone. FULL STORY: Suspected shooter may have written good-bye letter - KCPQ Waiting for your permission to load facebook comments.