Mats was at the party with Helena Andersson in 1992 the night she disappeared

Hear him tell in the clip above.

Mats Öfwerström was at the housewarming party in Töreboda that Helena left to go to Stadshotellet in Mariestad.

The party was held in Töreboda by Pernilla Wadebäck who was close friends with Helena.

Today, Pernilla is also a reporter at P4 Skaraborg.

Pernilla and Mats have followed the case closely in their profession.

- I think it will become clear in the next few days whether the detainee is the right person or not, says Mats Öfwerström.

The detainee is a man in his 60s.

- What we know that the police have on him is that he has traveled in a light car this night in central Mariestad.

Just a light car is central to the investigation.