Some evidence wins a case by being there. Spoliation is the evidence that wins by being gone.
Spoliation is the loss or destruction of evidence a party had a duty to keep. It rarely looks like a shredder. It looks like a truck’s electronic control module that gets overwritten in the thirty days after a wreck. A maintenance file that cannot be located. A surveillance camera on a seven-day loop that no one thought to pull until day eight. Safety-committee minutes that were routinely purged. The evidence does not get burned. It gets allowed to disappear.
That disappearance is where the law does something rare and severe.
When evidence dies on the watch of the party that controlled it, a judge can tell the jury to assume the missing thing would have hurt the side that lost it. That is the adverse inference, and it is the closest thing a courtroom has to a thunderclap. One instruction turns an empty folder into testimony. The jury never sees the document, and does not need to. They are told to believe it was bad for the people who let it vanish.
Here is the part every defendant learns too late. The duty to preserve does not wait for a lawsuit to be filed. It attaches the moment litigation is reasonably foreseeable, which in a serious injury case is the day of the injury. A company that let its automatic thirty-day delete keep running after it knew a person was hurt did not suffer an accident. It made a decision, and decisions have names.
The move: the first document out the door in any serious case is the litigation hold, in writing, specific, and dated. The black box. The logs. The video. The texts. Name the items, name the date, demand they be preserved. The letter does two jobs at once. It saves the evidence, and if the evidence dies anyway, it proves they were warned.
The other edge, and it is sharp. The rule points both ways. Your client’s truck, your client’s phone, your client’s own records are evidence too, and the duty lands on your side the same day it lands on theirs. Preserve your own house before you go looking through anyone else’s. Nothing collapses a spoliation argument faster than a lawyer who deleted something.
One word. The best exhibit in the file is sometimes the one that is missing, and the question the jury gets asked is who let it go.
The federal standard for lost electronic evidence lives in Federal Rule of Civil Procedure 37(e). Read the rule.
