"I saw a car that kind of lurched forward, as though it was in gear but no one was accelerating," the witness told the Malmö district court today, according to the news agency TT.
The testimony appears to confirm the story of Persson's companion, the 22-year-old man who was also shot as they sat in a car in October 2009. He told court last week that he had attempted to start the car and get away. The man survived the attack despite being shot in the head.
This afternoon, court intends to question a friend of Peter Mangs who claims he was threatened by Mangs after the suspect admitted killing Persson.
Last week, Mangs said the friend had "misunderstood" him when the prosecution briefly questioned him on the incident.
Mangs is being charged with unlawfully threatening the man, who also says Mangs said he would kill his partner and daughter if he went to the police.
The trial is expected to continue until mid-July.