How Do You Get a Federal Habeas Relief?

There are three silos of how your criminal case would go if you're charged with a capital case. You have the law and order version, then you can appeal that all the way up your state court of appeals. On the second silo, the collateral attack silo, you are still convicted. Now you can get to the federal silo for federal habeas relief. But now there's some really strict rules on what you're allowed to actually complain about. It needs to be federal violations, not violations of state law.