In June last year, Chief Prosecutor Krister Petersson announced at a high-profile press conference that the Palme Inquiry would be closed.

Petersson said, among other things, that they had arrived at Stig Engström, the so-called Skandiaman, was a suspect but that the investigation could not continue because Engström is dead.

It also emerged that the Palme Group had not succeeded in linking any murder weapon to Engström.

Petersson has since been criticized from several quarters, and in September the Ombudsman chose to initiate an investigation of Peterson's statements in connection with the press conference.

As a result of the criticism, Krister Petersson now states that the investigation may be taken up again.

"If strong and controllable information emerges, it can not be completely ruled out," he writes in an email to Expressen.