A player called [np]redical sent this demo, and it might really be an aimbotter (it is a bit short for me to be sure though). Just in case I'm uploading it here.
Notice: this demo is 4.1.1, so you will need to rename zpak001_assets.pk3 if you get an error trying to watch it.

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Marcos (any likeness to chance is pure reality)

As I said on IRC, I agree with the original uploader; they do seem to be snapping their target. The few misfires are simply due to them not loading the SR-8 scope.

Perfectly clear bot.

tdm-player325557

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Beginner’s Guide to Urban Terror (woefully out of date)

Daily Deadnade (last updated September 9, 2016)

Definitely. Btw.: Does that aiming through walls at
(imaginary?) enemies far away indicate he's also
wallhacking, or is that bot just aiming at some
random fixed point?

I’ve seen a lot of this “longingly gazing at a random brush on the oher side of the map until an enemy comes along” behavior over the year+ here, and it’s never the player pointing at an enemy, never the bot pointing at an enemy, it’s always random. (If you can’t see anyone there, neither can the cheater and the cheat; unless the map is really, really small, only part of the action gets transmitted — see this semi-randomly chosen page for basic explanation and theory.)

One could assume this happens when you get killed while the bot still stays fixed on the last enemy, but this won’t explain this cheater’s fascination with the sparse vegetation of Casa. (Aiming at the teammates is caused by a unnecessarily-changed setting.)

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Beginner’s Guide to Urban Terror (woefully out of date)

Daily Deadnade (last updated September 9, 2016)

Okay, I'm convinced it's not a wallhack. :-) Thanks for
the detailed explanation and links! <3

Banned him for 30 days now.