The probe into SRC International Sdn Bhd did not culminate in a prosecution because there was no case, said BN strategic communications director Abdul Rahman Dahlan.

He said the attorney-general decides on whether a case is prosecuted or otherwise as check and balance to ensure there is no abuse of power, including by investigating bodies.

"If an investigator has the intention to betray someone he/she is investigating, the prosecutor can thwart this, and if the investigator and prosecutor collude, then the court can block this...

"If (investigation, prosecution and conviction) powers are not separated, it would be easy to betray an innocent person," he said.