I believe that is the Judicial Branch.
In the United States, it is the executive branch of government that can pardon a convicted criminal. By issuing a pardon, the executive is overruling the decision of the judicial branch (the court system). Federal crimes can be pardoned by the President. Crimes tried and sentenced in state courts can be pardoned by the governor of that state. The only time a federal or state executive cannot grant a pardon is in cases of impeachment.
The federal courts here numerous types of court cases. A few of the cases are maritime law, copyright cases, patent cases, and bankruptcy.
The federal government has been trying cases against terrorists in the US District Courts in the jurisdictions where the crimes were committed.
Judicial.
It is the Judaical Branch made up by the Supreme Court as well as other federal courts.
The Judicial Branch of Government is the branch that tries case.
The federal and state court systems (this is not limited to the Judicial Branch in federal cases).
President doesn't have judicial power. Only the judicial branch has that power.
The Judicial Branch
State law crimes are heard in state court. Federal law crimes are heard in federal court. Both systems adjudicate different types of cases. In some cases the courts have concurrent jurisdiction and the authorities will conference to determine which court will take jurisdiction.
The Federal Courts try issues dealing with violations of Federal law. They also take appeals from state courts. There are four basic branches of the Federal Judiciary: U.S. Bankruptcy Court, U.S. District Court, U.S. Courts of Appeal and the U.S. Supreme Court. There are a number of specialty courts operated by the U.S. Government, too. Links are provided to the U.S. Judiciary website and to the Wikipedia article.
Judicial branch