This textbook discusses, in plain English, the constitutional provisions that criminal justice professionals and students need to know. It uses the conversational approach to exploring the intersection of the U.S. Constitution and the criminal justice system. In this textbook, constitutional principles and requirements matter more than names of cases. Cases are used as examples and stories, but this is not a casebook. Chapter 1 is an overview of the U.S. Constitution. It also examines the Habeas Corpus Suspension Clause, the Ex Post Facto Clause, the Second Amendment, and other provisions. Chapters 2 and 3 examine the Fifth Amendment, including the Self Incrimination Clause. Chapters 4 and 5 examine the Due Process Clauses that appear in both the Fifth and Fourteenth Amendments. The next three chapters examine the Sixth Amendment, which generally protects defendants’ trial rights. The four chapters after that examine the Fourth Amendment, which governs searches and seizures, and related issues. Chapter 13 examines the exclusionary rule, which applies primarily to searches and seizures. Chapter 14 examines the Eighth Amendment, which bans cruel and unusual punishment. The last two chapters examine the First Amendment, which protects people’s religious rights and free expression.The textbook is readable, gets to the point, and therefore covers more material than similar textbooks. The author – a former trial and appellate prosecutor at the local, federal, and international levels – has a passion for constitutional law and for sharing what he has learned about it. It comes through on every page.