Visa renewal while the passport is in custody of police

Hello

I have an issue with my sister's boyfriend (Emirati man). My nationality is Croatian.

My sister stays pregnant with him in a non-marriage relationship. He rejects her and he stops any contact with her.

One time I called him to ask why he does that. After few days, the police called me and told me how he opened a case against me. He told the police I want to kill him through the mafia.

I spent 3 nights in custody, I spoke with the public prosecutor, with a judge. They keep my passport and now after one month, I don't know what is the result of all that case. My residence visa expires, I want to solve this.

Please advise me.

Regards