Emma Vangstad, acting group chief at the Mittel police region, specializing in Internet-related sexual abuse of children, says that parents do not always find out what happened to their child.

- I think there is a big dark figure linked to this, she says.

She talks about sexual crimes that happen to children through various video chat apps, a problem that UNT has reported on, among other things. Most reports get the police connected to Snapchat, but there are several other apps that have been used frequently by young people, says Emma Vangstad.

Hilde Wikberg, head of unit for youth youth in Uppsala, also emphasizes that it is a dark figure.

- Many young people feel guilt and shame about what they have been exposed to and seen, so it can be difficult for young people to tell, she says.

An example of what kind of crime it is can be found in a review for a video chat app that has grown in popularity among young people:

"The app is great but you may have to set an age limit because it is a huge number that shows their genitals and violates the rules".

Can track the perpetrators

A common denominator among many of these apps is that it is easy to remain anonymous. However, Emma Vangstad assures that the perpetrators should not feel completely safe.

- They can be traced and there are also several organizations working together to deal with this - both in Sweden and abroad, she says.

In the clip, Emma Vangstad advises parents on how they can relate to their children's use of social media.