That's mostly FUD from a criminal defense firm trying to scare people into hiring them.

Cops are not as bad as people think they are. Cops behaving badly (in the U.S.) is news because it is the exception and not the norm.

~30% of wrongful convictions is just rounding error, right?

https://www.law.umich.edu/special/exoneration/Pages/detailli...

Read your own source. Because, by your logic, SBF being a con artist means that all programmers are con artists.

30% These convictions aren't the result of people talking to the police and then getting screwed over. The overwhelming majority of them are the result of cross-racial witness identifications.

To put it bluntly: most wrongful convictions are due to racism on the part of prosecution witnesses.