Arjun said Hung arrested him without sufficient investigation.
Defence counsel Stewart Wong Kai-ming said Hung had spoken to Arjun, his mother and two other witnesses for some 40 minutes before making the arrest.
But Anita said Hung told her son he was going to arrest him in their first conversation, and repeatedly mentioned the word “arrest”.
She did not think an 11-year-old could be arrested and only understood that her son was under arrest after her husband paid his bail at the police station that night, Anita said.
The teenager, described as a child prodigy, said he has nightmares and anxiety as a result of the incident.
