Family axe murder accused Henri van Breda has broken down while the court heard recordings of his emergency call the morning after the attack.
The 22-year-old is accused of killing his parents and older brother and the attempted murder of his younger sister in their Stellenbosch home in January 2015.
He claims an intruder was responsible.
Janine Philander worked at the City of Cape Town's emergency call centre and answered the accused’s call on 27 January 2015.
She says she initially thought the call was a prank because the accused was hesitant and giggled during the call.
His lawyers, however, insist he was not giggling and was instead sobbing.
Advocate Pieter Botha says his client could also be heard stuttering.
He says van Breda underwent extensive therapy for his speech impediment as a child and was taught to speak slowly and clearly.
The accused broke down and was emotional while listening to the recorded conversation.