Mathew Ginnifer of 4 Plunkett Road, Ballyphehane, Cork, denied all the charges against him and said he was pleading not guilty to all counts.
Detective Garda James Nagle arrested and charged Ginnifer with threatening to kill the schoolboy on March 4.
He also charged the defendant with stealing a car belonging to the boy’s mother on the same day and multiple counts of dangerous driving and driving a stolen car the following day.
Ginnifer was also charged with having no insurance and causing criminal damage to cars at Blackpool shopping centre and at Lavitt’s Quay.
Det Garda Nagle said, in his objection to bail: “These are serious offences. The likely sentence on conviction is long. The nature of the evidence is strong. A number of gardaí allegedly observed the defendant driving the vehicle on the dates in question.
“It is alleged there is a witness who heard the threats being made.
“I am of the belief that [remanding him in custody] is necessary to prevent further serious offences. I believe if this defendant is given bail there is a strong possibility he will not turn up to meet his court case.
“Also I am of the belief that the injured party in the alleged threats is only 14 and I believe there is a possibility witnesses could be interfered with in this case,” Det Garda Nagle said.
Solicitor Frank Buttimer submitted to Judge Leo Malone the court was being asked to decide the case on the basis of what the detective believed rather than on any evidence being put before the court.
Ginnifer, meanwhile, stated: “I won’t be committing any offences when released. I will have no communication [with witnesses]. I would accept anything at all [by way of conditions] if granted bail.”
The accused, in answer to Inspector Gary McPolin, said he was not guilty on all counts.
Judge Malone refused bail and remanded Ginnifer in custody to appear in Cork District Court today by video link from prison.