Seriously? Spend just 2 minutes on google with the keywords you want me to prove and you'll find mountains of just that.
Already provided you multiple links to banksters being caught, fined/jailed.
Since your skull is apparently too thick, here's some more.
Seriously, there's a mountain of these proving collusion, corruption, rigging, everything you are trying to use as an argument to call gold bugs "conspiracy theorists".
It's all well known to everyone this is common practice, even after being caught they simply become better at hiding it - unless you're as unlucky as JP Morgan who were caught twice in 2020.
There's simply no argument you can make that it hasn't been happening and isn't up until this day.
One last keyword you mentioned - dumps - gee look at what happened this week.
https://www.bullionstar.com/blogs/ronan-manly/gold-price-smash-in-paper-but-physical-demand-on-fire/I know you'll just change the topic, weasel your way out of countering these factual lawsuits and times they've been caught... never mind how often they aren't caught... seriously you need to wake up Skol.
