Mountain Grove Missouri closed their entire school system that day. I distinctly remember having a new NES game and being particularly annoyed that I was explicitly told not to stay inside at any point of the day for more than a few minutes.

A lot of us car nuts have been hacking our car computers for years. There's systems that go light years beyond the factory systems. 10 years ago, I was able to use my Palm Pilot II to modify my fuel trims while driving, monitor horsepower and adjust an electronically controlled boost controller for my turbo. That was all on a 1990 Talon AWD so it didn't even had ODBII yet. My new model actually fully replaced the EEPROM chips in the ECU and has bluetooth capabilities to be controlled from my smartphone, controls the doorlocks, radio, moonroof etc. In theory, it would be a trival bluetooth hack to not only cause the engine to stop but to detonate the engine (destroy - not actually cause an explosion) by pulling the fuel trims too lean. The bluetooth module was a snap on vampire chip with a tiny lead to a receiver. The whole system looked 100% factory and was tiny. It would be a trival system to integrate a remote kill and unless they were specifically looking for a technology related problem, investigators would likely never realize that it had been installed.

I'll admit, I only skimmed the article, but wouldn't it make a lot more sense that the immune system would be boosted from the physical act of them taking the "Before" sample? The fact that you're missing blood is something the body would definately sense and react to. Not saying it's implausible, but it seems like a rather large hole in the logic.