Kevin Foy
The Kevin Foy bomb-making connection to Columbine is something many people don't even know about, as these discussions have been buried over time. However, I have obtained key documents related to the Foy case and after reading all relevant documents, it's clear that the Littleton area had a bomb problem. This is further supported by the fact that in the 1998-1999 school year, there were an average of 2 bomb detonations reported every week, sometimes more. I will post these documents eventually.
The summary is that Eric Harris taught an Arvada HS freshman how to make a very specific type of explosive device made from empty VHS cassette tape shells using bbs, powder, a cricket, and electrical tape. This type of device was found in Harris' bedroom, and the freshman gave one of these devices to a friend (Shayna Coulter) about 3 weeks before the shooting.
Foy denied being taught by Eric at first to police, but later admitted it to his therapist. The bombs Eric taught him how to make are not found in the "Anarchist's Cookbook" or another manual they used that I won't list by name. This design is something the TCMers likely came up with on their own.
Here's the short version of the full story.
On 3/22/1999, Arvada West HS student Shayna Coulter was caught with an explosive device in her dresser drawer. She was given this device by another student named Kevin Foy.
Foy was one of the kids in the area who was making explosives with the rest of the area kids. Both Coulter and Foy were arrested and booked. Coulter was the one who was sent to Mountview Detention Center. You may have heard of her from the Arvada documents.
Here's where it gets deeper.
After Columbine happened less than a month later, Foy was re-interviewed because the device he had given to Coulter matched a device found during the Columbine investigation in Eric's bedroom.
That doesn't sound all that interesting, until you read the device description.
So basically, it was a cricket with a firecracker fuse stuffed inside an empty video tape shell with firework and shotgun shell powder, glued together and wrapped in black electrical tape.
That's pretty darn specific.
This type of device was recovered from Harris' bedroom. So, the statement that it was found 'inside or nearby Columbine' may have been a loose reference to the Harris home.
"Plastic Cassette Bomb w/c02 & elec match" (Evidence Vol. I, p.11268)
It's common for police to not reveal bomb constructions to the public during an investigation to make sure they can catch everyone involved, especially if they are specific constructions only those involved would know about. The unredacted descriptions of their sloppy devices seem more like props and noise makers than real explosive devices.
Foy was in counseling and his counselor reported him to police when he confessed that Eric Harris taught him to make bombs.
The construction was exactly the same. And Foy lied nonstop about everything from the beginning even after being caught. He denied learning from Eric and even knowing Eric, but confessed to his counselor.
Foy claimed he came up with the construction design on his own.
We know this type of device was found in Harris' bedroom, but police never made it public that Harris was teaching other people how to make bombs. That's kind of a big deal.
How do we know the bombs really matched and it wasn't just hearsay or a guess?
Side point: The same bomb techs who responded to the Foy/Coulter bomb issue in person also responded to Columbine. They were not going based on hearsay regarding the bomb construction. They knew it was a match because they worked the Columbine case. We're talking about the Jefferson County Bomb Squad here, specifically Mike Guerra and Glenn Grove.
We're not talking about their cricket-powered La-z-man molotovs, basic pipe bombs, or weird propane canisters with noisy crickets attached that we already know about. We're talking about stuffing empty cassette tapes full of powder and bbs and a cricket with a repurposed firework fuse. It would be a really crazy coincidence if both Harris and Foy just happened to come up with the same type of explosive device design off the top of their heads. And it's not in the Anarchist's Cookbook or the other popular manual their group used to experiment with, so those can be ruled out as a common source.
Foy actually admitted to reading the AC, but claimed he read it at the public library, but it wasn't a book you could check out - you had to read it there because it was considered reference material. (Right, because I'm sure a public library would have a copy!)
Of course, any kid caught making explosives will deny everything until they're backed into a corner. That's what Foy did, too. He had a bomb-making kit just like Harris had, and denied that any of the components were for making explosives and said he had no idea why there would be black powder and empty shot shells in his kit. His parents also caught him making bombs and let him keep his bomb kit, just like Eric's parents.