It would also fry your electronics and be incredibly noticeable and very easy to prove.
Also, 10 000W wouldn't be enough because that power isn't into a single resonant cavity, we'd be talking about pulses with instantaneous power an order of magnitude higher at the very least.
The pulse was still nowhere near directional enough to only impact a single person over long ranges and not essentially act as a massively detectable EMP.
By noticeable, I mean as in electronics being destroyed, and any kind of equipment the US would have obviously deployed to attempt to detect it would register an absolutely massive signature.
Also, 10 000W wouldn't be enough because that power isn't into a single resonant cavity, we'd be talking about pulses with instantaneous power an order of magnitude higher at the very least.