It has taken the National Prosecuting Authority (NPA) over a year to finalise its case in the van Breda family murders, proving that investigations are much more complex than often thought.
What really happens when police arrive at a crime scene, and how do they collect watertight evidence?
Forensic scientist Dr David Klatzow explores what it takes to ensure a suspect doesn't get away with murder:
1. Finding signs of conflict or motive which may have led to the event
Evidence of shouting, arguments or eyewitness accounts of any fallouts which preceded the murder.
2. Studying the suspects actions after the event
Examining the accused's behaviour immediately after the murder; whether he tampers with the crime scene or calls for help.
3. Eliminating all possibilities of outside intrusion or alternative suspects
4. Combing through the crime scene for DNA evidence
Analysing evidence such as blood splatter, weapons or physical wounds will help determine the sequence of events.
Listen to the full conversation from CapeTalk's Breakfast with Kieno Kammies: