Blood stains found on a knife and gun allegedly used to kill Jo Cox were a "billion-to-one" match to the MP and the man accused of murdering her, a court has heard.
DNA expert Hilary Parkinson told the Old Bailey "blood spots" from the Labour politician found on the gun showed she had been very close to it.
A bloody handprint in the Labour politician's blood was also found on a brown jacket prosecutors claim Thomas Mair, 53, dropped in a nearby street as he left the scene.
His DNA was also found inside it, jurors heard.
Both their DNA was found on other items in the holdall. Mair's was also found on the ammunition in the plastic bag, the court was told.
Ms Parkinson said: "The findings, taken together, are in keeping with Thomas Mair being involved in the incident which led to the death of Jo Cox and the injury to Bernard Carter-Kenny".
She may have only served her constituents for little more than a year, but those whose lives Jo Cox touched won't forget her lasting legacy.
Thomas Mair is being described as an extremist, a fanatic, an assassin – even ‘a constituent’. But make no mistake – he is a terrorist.
Thomas Mair "betrayed the quintessence of our country" in the senseless killing of MP Jo Cox, the judge said.