The Father of the three Singh siblings killed in Brisbane 6 years ago has denied any involvement in illegal drug trade.

Neelima Singh, her brother Kunal and sister Sidhi were killed at their Bridgeman Downs home in 2003 and the man who found their bodies, Max Sica has been charged with their murder.

ABC News reports that Sica's lawyer Sam Di Carlo re-examined Vijay Singh in the Brisbane Magistrates Court yesterday however Singh denied importing pseudoephedrine from Fiji.

He also denied owing any money over drugs and denied any knowledge of his son's involvement in drugs.

Lawyer Di Carlo also asked Singh about a phone call he received which was also played in court in which two men were speaking in Fijian and English threatening to harm Singh's family.

The hearing continues today.