When news articles mention the maximum, especially in headlines, it feels a bit misleading. It seems there's a decent chance there is little or no prison.
A reasonable estimate based on sentencing guidelines isn't super hard for a lawyer to work out, and it'd be far more useful for readers, but it's slightly more work and it makes for significantly less exciting headlines.
Lots of things lawyers do are easy for lawyers to figure out. That doesn't mean a programmer is going to be able to make a reasonable estimate unless they both understand the law and the history of the accused.