Contaminated evidence is a huge issue, even in the United States. There has to be protection of the chain of custody. There has to be some education about what we need to gather, how we gather it and where it goes before it's lost, destroyed or contaminated, because that is also a huge problem in the United States. That was a problem in the Larry Nassar case. This case was so old that by the time there was the investigation, things got shredded, lost and destroyed. It will take education, and it will also take penalty, because that's tampering with evidence.
The legal system must partner with you to look at where they can be helpful, and then you need to follow through. You may not want to jail a coach, but if they are a bad actor, why not jail them like the rest? Just because they wear the hat of a coach, that doesn't mean they shouldn't be in front of a judge and possibly go to prison.
We need to look at evidence and even train athletes. Athletes should know where to go, how to protect evidence, how to protect themselves and how to report. If we start with education on all of that, you will find less contamination, more reporting and a cleaner system.