William Richard Brady, 64, is accused of intimidating a man in an attempt to influence him to not to testify in court.

Documents tendered to Wollongong Local Court on Monday said Brady had attended the courthouse for a hearing on Friday to defend allegations he assaulted a man and caused actual bodily harm.

Read more: Shellharbour shop owner acquitted of raping employee

During a short recess, the man who was the alleged victim along with another witness in the case had left the courthouse and went to Wollongong mall to attend Westpac Bank.

Brady also went to the mall and walked past the bank where he stopped to speak to the witness who was waiting outside.

The alleged victim left the bank a short time later and Brady allegedly said to him, "I told you not to come today, there will be repercussions" which was also allegedly heard by the witness.

Brady also allegedly said, "I told you not to come to court f*** off or I'll kick your ass".

The alleged victim and witness left the mall and went home.

The man did not want to return to court because of the alleged threat, the documents said.

Police prosecuting the hearing called the man when he did not return and they were informed of the alleged conversation outside the bank.

Officers seized CCTV footage from inside the mall confirming the interaction.

Police then returned to court to arrest Brady who was still waiting for his matter to be heard.

He was taken into custody and charged with threatening a person with intent to influence.

As part of his bail conditions he was prohibited from going near or contacting prosecution witnesses.

In court on Monday. police prosecutor Sergeant Ben Bragger said the case against Brady was "very strong" given there was two witnesses and CCTV footage.

He noted Brady had a "poor record for violence and intimidation" and the allegation was one of "aggression", adding he could face up to 10 years in prison if convicted.

Defence lawyer Emel Ozer said her Aboriginal client suffered from back pain and would only receive limited medical treatment in custody. She added Brady had been diagnosed with schizophrenia, making him a more vulnerable person in custody.

Magistrate Gabriel Fleming said the charge was a "very, very serious allegation" that "goes to the heart of the justice system".

She took into account Brady's history of violence, non compliance with court orders and accepted he would be vulnerable in custody but the seriousness of the charge and strength of the prosecution case were too strong to mitigate concerns before she refused to grant bail.

The case was adjourned to May 24.

Read more court and crime stories.

The Illawarra Mercury newsroom is funded by our readers. You can subscribe to support our journalism here.