The cross-examination of the first police officer to arrive on the crime scene continued in the Western Cape High Court on Tuesday.
Van Breda is accused of killing his parents and older brother at their De Zalze Estate home in Stellenbosch more than two years ago.
In his plea explanation, van Breda claims that a balaclava-clad, axe-wielding intruder attacked his family.
While Sergeant Adrian Kleynhans had testified it would have been impossible for intruders to gain access, the defence has demonstrated that security breaches aren't impossible.
