Even though the exact words aren’t written in the Constitution, the U.S. Supreme Court has held for more than a century that the presumption of innocence is a constitutional mandate rooted in two things: The Due Process Clauses and the burden of proof standard.

The Due Process Clauses in the Constitution are the Fifth Amendment, reaffirmed and solidified as “law of the land” through case law (also known as common law) in federal cases, and the Fourteenth Amendment (same as above), established through decisions in state cases.

The burden of proof standard is the straightforward requirement—a constitutional rule—that the government must prove guilt beyond a reasonable doubt. This standard and the presumption of innocence rise and fall together.

In re Winship (1970), a key Supreme Court case addressing these issues, held that the presumption of innocence and the “beyond a reasonable doubt” standard are constitutionally required in criminal prosecutions.

“… it should not be tolerated by anyone who knows better.”

The Court explained that these protections come from the Due Process Clauses, even though the Constitution doesn’t spell them out word‑for‑word.

So what does this mean in practice?

For starters, it means that the government must prove every element of a criminal charge; the accused does not have to prove anything, and courts must instruct juries on the presumption of innocence.

Any law or procedure that shifts the burden to the accused is unconstitutional.

Why this matters for automated camera enforcement

Camera‑ticket schemes invert the presumption of innocence by presuming the registered owner committed a violation and requiring the owner to prove they didn’t (or that they weren’t driving when the alleged violation occurred). They also rely on unsworn, machine‑generated evidence and issue citations that do not rely on a human witness.

That burden‑shifting is exactly the kind of due‑process defect the Supreme Court has repeatedly rejected. No other type of serious judicial proceeding with potentially punitive consequences allows an accused person to be treated this way, and it should not be tolerated by anyone who knows better.

How have many state legislators who support automated camera enforcement schemes gotten around this unconstitutional burden shifting?

Instead of treating camera accusations as criminal or quasi‑criminal (where the government must prove its case with admissible evidence and respect the presumption of innocence), many state legislatures simply moved these infractions into the “civil” category. This maneuver lets them claim that the usual constitutional protections don’t apply.

Even as “civil” penalties, the government is still enforcing that penalty through state power, accusing a specific person of a law violation, and relying on “evidence” that isn’t admissible to justify a monetary penalty.

In every state that uses this workaround, the evidence rules are still violated because no human witness can authenticate the machine‑generated accusation. A camera cannot testify. A vendor employee cannot testify to what happened. And the city cannot cross‑examine its own automated system.

So the answer is simple:

Legislators got around the constitutional burden by changing the label—not the substance—of the accusation. The scheme still relies on evidence that would never be admissible in any real proceeding, civil or criminal.

Again, it should not be tolerated by anyone who knows better.