FIRST ON KHQ: What The FBI Found Inside Of The Backpack - Spokane, North Idaho News & Weather KHQ.com

FIRST ON KHQ: What The FBI Found Inside Of The Backpack

SPOKANE, Wash. – Authorities close to an investigation of a backpack bomb tell KHQ-TV the device discovered on January 17th contained two pipes in a plywood box and was surrounded by tape and t-shirts.

Three workers found the backpack along the parade route where thousands of people were set to march in honor of Martin Luther King, Jr. in January.

In the most detailed account yet of what was inside that backpack, KHQ Local News Reporter Anthony Gomes learned a metal pipe was welded to a base and placed in a plywood box. The device also held a white PVC pipe containing a plastic bag of explosive. 

Authorities say device also contained lead fishing weights, which were intended to be shrapnel, projectiles thrown into the air when the device exploded.

Those weights were covered in a green substance later determined to be a common ingredient in rat poison. Sources differ on the effect the poison would have had.

Rat poison has been used to inflict mass casualties during suicide bombings in the Middle East.  It is an anti-coagulant which inhibits the body's ability to clot blood.

Some authorities believe the rat poison would have been destroyed and neutralized if it exploded in the device found in downtown Spokane.

The bomb was wired with a car alarm, which could have been used to trigger the bomb by remote control. Authorities are still looking for the remote control.

The FBI called the backpack an act of domestic terrorism and said solving the case was their highest priority.

A Stevens County man was arrested on March 9th in connection to the case. 

Kevin Harpham is in custody facing two counts related to the investigation. Much of the government's case against him remains sealed in court documents.

The FBI has said the investigation remains active and they continue investigating leads in the case.

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