There are (supposedly) fairly well-defined use cases for probable cause and sufficient evidence to prosecute, and it seems these were all trampled over in this case.
In regards to the Judas Priest comments, I think that may have been some unintentional hyperbole/satire, pointing at the widely disproved profiling of school shooters. The Harris/Klebold case had a lot of cultural baggage of that type, most of which was fabricated by journalists. Citing them as fans of Marilyn Manson is one example; they possessed no Manson albums or memorabilia.
There are (supposedly) fairly well-defined use cases for probable cause and sufficient evidence to prosecute, and it seems these were all trampled over in this case.
In regards to the Judas Priest comments, I think that may have been some unintentional hyperbole/satire, pointing at the widely disproved profiling of school shooters. The Harris/Klebold case had a lot of cultural baggage of that type, most of which was fabricated by journalists. Citing them as fans of Marilyn Manson is one example; they possessed no Manson albums or memorabilia.