It would be the former boyfriend of the mother of the victim. According to the first findings, the perpetrator, who is known to the police for violent acts, started strangling the woman when the victim arrived. He would then have tried to intervene and suffered several stab wounds. The mother was also injured.
The suspected perpetrator has fled. A search of his house in Grâce-Hollogne took place, but it turned up nothing. The car he drove off in is a Fiat 500 Abarth.