PORTLAND, Ore. (KOIN) – The charges faced by a teen accused of making a “detailed and imminent” plan for a mass shooting at a Kelso mall were released by the Columbia County Sheriff's Office on Friday.

The Columbia County teen, whose name remains unreleased to the public, faces four felony charges of second-degree attempted murder, attempted first-degree assault, and two counts of unlawful use of a weapon.

He also faces misdemeanor charges of tampering with physical evidence, second-degree disorderly conduct, and two counts of unlawful firearm possession.

On Thursday, FBI Portland announced the teen had planned to use a chlorine bomb to cause panic and then shoot patrons at the Three Rivers Mall in Kelso, Wash. before he planned to kill himself.

The FBI received a tip about the plan on

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