Hans Melander, who has worked with the Palm Investigation since 2002, says there is no new technical evidence.

Melander explains that during the late stage of the investigation, they became interested in a weapon and a letter in which a person said they had links to the murder - but nothing has been possible to associate with Stig Engström.

By collecting DNA from relatives of Stig Engström, it was hoped to prove that a letter sent to the police came from him. In the letter, the sender said he had links to the murder.  

- We thought it fit into the picture we got of Engström and we did not rule out that it could come from him. We have looked at different possibilities regarding the letters, but there is no reason to believe that it has anything to do with Engström, says Melander.

Test shoot the friend's weapon

The weapon referred to belonged to a friend of Engström, who in the media is referred to as "the weapon collector".

- It is a weapon that goes into the category of weapons that are possible murder weapons. But it could not be shown that it was neither the right nor the wrong weapon, says Melander and continues:

- The connection is that the weapon at this time belonged to an acquaintance of Engström, the man who in the media has been referred to as the gun collector.

Where was the weapon now?

- Now the weapon was with another person.

788 weapons have been shot in the Palme investigation and, according to Melander, it is not impossible that one of them could be the actual murder weapon.

- Yes, it can be. If you submit weapons for test shooting there is a nine-degree scale of + 4 to - 4 and in between there is a zero. If you get a zero, that means it means you can't say that there is something that speaks neither for nor against.