NSW Police said when the family called his mobile phone on the night of his disappearance, they believed they could hear a man screaming before the call ended. newsiviewlistenLoading ABC NewsNews HomePolice offer $1m reward to find Mahmoud Sleiman, who is suspected murdered by organised crimeShareShare articlePolice offer $1m reward to find Mahmoud Sleiman, who is suspected murdered by organised crimeTopic:Missing Person.