About a year ago, a now 21-year-old was ported from Husby.
A video that has been spread on social media shows how a group of boys of the same age humiliate and force him through the barriers on the subway.
He has received a red card, they write in the video.
The group that ported him is linked to a local criminal network.
Attention-grabbing trial in Copenhagen
Recently, the media attention has been about the two rival gangs Dödspatrullen and Shottaz from the Rinkeby area.
I have been on site in Denmark to watch a trial on double murder and attempted murder in a Danish residential area last summer.
Five people connected to the Death Patrol have been charged, one of whom has been singled out as one of the leaders, for having murdered two rivals in Shottaz.
Ten young men have been murdered in that conflict alone since the summer of 2015. It is the bloodiest ever in Stockholm in the gang environment, according to the police.
50 gang groups in Stockholm
In Stockholm, there are about 50 different gang groups, consisting of 1,500 people.
Beneath them are a further larger number, often younger, who act as couriers, languish and stand on the threshold of an even more serious crime.
In parallel with the Rinkeby conflict, other criminal networks in the Järva area have grown stronger.
It is important that we see how the murders are connected, that we do not see them as individual acts.
Perhaps it will help the rest of society to understand the seriousness and to put in all the resources needed to reduce the number of parents who will need to bury their children.
In the latest spiral of violence, a term used by the police, three young men have been killed in less than two months.
The recent spiral of violence
The first murder took place in early July.
A 21-year-old was kicked and beaten so badly that he later died.
The abuse was filmed and spread on social media.
The murder victim is said to have been involved in porting the young man in Husby.
Shortly after the news that the victim had died, two masked men drove to Tensta center on a moped.
To revenge.
One was armed with an automatic weapon.
They ran against rivals accused of beating to death.
Are you that far?
A network in Tensta is suspected of the fatal beating against a rival from a network in Husby.
Internal purges in progress
Within the police today, there is good knowledge of the often complex relationships where previously close friends and relatives can now be enemies.
A world where loyalties change overnight.
Internal purges are currently underway within several gangs.
Among other things in Shottaz, where a former leading person was recently shot.
He is considered to have been a bully.
Several people involved in the conflicts are now pushing for apartments or hiding places outside Järva, so as not to become the next target.
The motive for the murders can easily be described in three words.
Money.
Drug.
Honor.
Socially vulnerable areas
The scene of the many parallel conflicts is Husby, Rinkeby and Tensta, three so-called particularly vulnerable areas in northwest Stockholm.
Socio-economically weak with high unemployment and high youth unemployment.
There, every second ninth-grader at several schools does not have access to upper secondary school.
Compared to one in ten in all of Stockholm.
There are also areas that have problems with parents not sending their children to preschool.
Which means that the language is worse once they start school.
In many cases, the parents themselves have difficulty with the Swedish language.
A complex problem.
Major social challenges.
A police chief recently told me how the failure at school annually fills the already growing crowd of unemployed homemakers with hundreds of new young people in Järva.
A perfect breeding ground that older criminals can attract with gold chains, designer clothes, expensive watches and drug money.
The conflict escalates
After the first murder, the next came.
One month after the fatal beating in Tensta, a 22-year-old man was shot in front of playing children and families in Rinkeby.
He was part of the network that, according to the local parallel justice system and sources with transparency, was behind the fatal beating.
This should be revenge.
After the second murder, people in the network in Husby began to post pictures on social media in sync, with music references that have been interpreted in a single way:
We shot him.
In the same post, pictures of the fatally beaten friend are shared.
Here is another connection that shows how the violence takes place within a small circle in Järva.
The victim in Rinkeby is the cousin of the 23-year-old, previously appointed leader in Shottaz, who was shot dead in Denmark.
Third murder in a short time
On Thursday, a week after the murder in Rinkeby, a third young man was found shot dead next to the bushes in a quiet residential area in Spånga, not far from Tensta and the other much more violent areas.
He had just turned 21 years old.
A woman found him when she was going to her workplace in the morning.
None of the neighbors I spoke to heard shots or saw anything suspicious before the police cordoned off the area.
It remains to be seen if that was where he was murdered.
The young man in Spånga was charged with a crime and moved around in Järva's criminal environment.
He was also a friend of the other victim in Rinkeby.
A picture of them is now being spread on social media.
The latest victim in Spånga was the man who was ported from Husby.
Now the police are trying to put together puzzles to understand the latest spiral of violence and secure evidence that leads to the culprits.
They are also trying to find out if and if so how the latest murders are connected.
There are many indications that this is the case, and that many gangs are involved in various ways.
"Now it's about surviving or dying," said one source.
Do you know more about the conflict? Tip the reporter here.