A criminal jury found the other driver not guilty in criminal court. Does that end your injury case?
No, because a civil case uses a lower bar. The personal injury proof standard in California asks only whether each fact is more likely true than not true. Whoever files the case usually carries that burden on the main points, and the defense carries it on the defenses it raises. A tie goes against whoever has the burden.
What the Burden of Proof Means
Carrying the burden means you must convince the judge or jury. Evidence Code section 500 says a party has the burden on each fact essential to the claim or defense it is asserting. Section 115 sets the default level as a preponderance of the evidence unless a law says otherwise.
California’s civil jury instructions, called CACI, explain this in plain words. CACI No. 200 tells jurors that a party must persuade them, by the evidence presented in court, that what it must prove is more likely to be true than not true.
How Civil Courts Apply the Proof Standard in Personal Injury Cases
Lawyers often use the older name, preponderance of the evidence. Picture a scale. If the evidence on one side weighs even slightly more, that side wins on that fact.
CACI No. 200 covers the other side too. If jurors find the evidence evenly balanced on a fact, they must find it was not proved. So a perfectly balanced case ends in a loss for the party with the burden.
Why Criminal Court Uses a Different Bar
Criminal cases require proof beyond a reasonable doubt, which CACI No. 200 contrasts directly with the civil standard. That gap explains why one crash can produce two different results.
A criminal jury may acquit a driver because some doubt remained. Looking at the same facts, a civil jury can find the driver probably at fault. In a California civil trial, nine of twelve jurors must agree on a verdict. Unanimity is not required.
Weighing Evidence Under the Personal Injury Standard of Proof
CACI No. 200 tells jurors to consider all the evidence, no matter which party produced it. Your opponent’s own records can help prove your case, and yours can help theirs. Jurors are not supposed to ignore a helpful document just because the other side offered it.
Evidence includes testimony, photos, video, medical records and opinions from doctors or engineers. Keeping it safe early matters, as explained in how to preserve accident evidence.
Conflicting Witnesses and Counting Heads
Stories often clash. One driver swears the light was green, and the other says red. CACI No. 107 tells jurors that people forget and make honest mistakes, so a difference alone does not make testimony false.
That instruction also says not to decide anything simply because more witnesses testified for one side. If jurors believe it, a single witness is enough to prove a fact.
A Sacramento Example
Here is a hypothetical. Two cars collide at Watt Avenue and El Camino Avenue. Three passengers from one car say the other driver ran the red light. A lone bus rider who knows neither driver says the opposite, and a dashcam clip from a nearby car backs her up.
Under the civil rule, a jury could side with the one neutral witness and the video. Credibility and corroboration outweigh raw numbers.
When the Burden Shifts to the Defense
Defenses carry their own burden. Under CACI No. 405, a defendant who claims the injured person’s own carelessness added to the harm must prove it. You can see how that reduces a recovery in how comparative negligence works.
Failure to mitigate damages works the same way. A defense lawyer who says you delayed treatment and made your injury worse has to prove that claim with evidence, not just suggest it.
A Higher Personal Injury Proof Standard for Some Issues
Some facts need clear and convincing evidence. CACI No. 201 defines that as persuading the jury that a fact is highly probable. Jurors learn from the judge which facts carry the higher bar.
Punitive damages are the most common example in injury cases. Civil Code section 3294 allows them only on clear and convincing proof of malice, oppression or fraud, such as a drunk driver with prior convictions who chose to drive anyway.
Proof Standards Outside the Courtroom
Most claims settle without trial, yet the personal injury proof standard shapes those negotiations. Adjusters and lawyers estimate how a jury would weigh the proof, and gaps in the evidence lower a claim’s value.
Common weak spots include long gaps in treatment, no photos of the scene and no witness names. Each one gives the insurer room to argue a fact is unproven. A lawyer can explain how a jury may see the evidence, and the questions to ask are in what to ask before hiring an injury attorney.
Common Questions
Do I have to prove my case with certainty?
No. Certainty is not required in a civil case. You need to show each essential fact is probably true, a far lower bar compared to the criminal standard.
Can a criminal conviction help my civil case?
It can. A felony conviction for the same conduct may be used as evidence, and a guilty plea can count as an admission. An acquittal does not stop a civil case, because the civil standard is lower.
Who has to prove the extent of my injuries?
You do. Injured people must prove damages by the same civil standard, usually through medical records, bills and doctor testimony. Future losses must be reasonably certain to occur.
In short, the personal injury proof standard is a tilted scale, not a mountain. Gather evidence early and look for neutral witnesses. You can read the jury guides in the current CACI edition on the courts website, and more basics are in the personal injury hub.
This article is general information, not legal advice. Laws and deadlines change and every case is different. Talk with a licensed California attorney about your situation.