The men are suspected of having handled several firearms, including the suspected murder weapon, a Kalashnikov.
The weapons appear in a music video that was recorded before the murder, where the getaway car that was used can also be seen.
- As I understand it, this video will be central to the prosecutor.
Perpetrators, getaway cars, murder weapons and more appear in the video.
It will be like a circle that unites this entire investigation, but also other suspicions about these people, says Diamant Salihu, SVT's reporter.
"Show violent capital"
At the same time as it means that the prosecutor received a lot of evidence for free, it also has a purpose for those who appear in the video, he says.
- This group wants to show their violent capital.
Music is a platform that can reach many people.
And weapons in particular are a way of sending signals to other people about the capacity for violence they have.
It was during the night until August 2 last year that the murder took place outside a fast food restaurant in the Stockholm suburb of Norsborg.
The target of the shooting is suspected to have been two people with links to criminal gangs.
Rival to the Vårbyn network
A total of eight people are suspected of crimes in connection with the murder of Adriana, who was out walking the family's dog.
In addition to the three people whom the prosecutor is now prosecuting for a particularly serious gun crime, five other people are suspected of the murder itself.
Two of these are detained while three are detained in their absence and are believed to be abroad.
Among the suspects are a rap artist and a gang leader - a designated rival to the so-called Vårbynätverket.
He has previously been detained for other crimes and was subjected as recently as last year to an attempted murder in a high-profile shooting at the King's curve.
At 1 p.m., the prosecutor will present the indictment at a press conference.