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AS IT HAPPENED: No unknown DNA at Van Breda murder scene, says forensic expert

News24 journalist Tammy Petersen is reporting from court. Follow her here.
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07 Aug 2017

Court will adjourn until 10am tomorrow! 

07 Aug 2017

Laundry door 'blood' was tested, but found to have not been blood.

07 Aug 2017

Shower floor blood - Otto says because its a shower, the use of soap and detergents is expected. You would use soap and shower gel. Likely the DNA was blood, as it is more resistant to normal detergents.

07 Aug 2017

If I wear full PPE - gloves, balaclava, - if I cover my body and I come in and leave, I wont leave a trace. The crime scene may leave a trace on me, but I wont leave a trace.

07 Aug 2017

She explains the Locard principle: Every touch leaves a trace. That is a first law of forensics, Otto says

07 Aug 2017

Galloway asks what are the odds of person entering and not leaving DNA? Botha objects.

07 Aug 2017

Blood is more resistant to average detergent.

07 Aug 2017

She didn't find any unknown DNA.

07 Aug 2017

Blood on bottom of axe handle: could only identify Henri's blood, but other DNA is family members, but not unknown DNA.

07 Aug 2017

Common cause that five people were attacked with axe in their own home. None of my DNA results were surprising.

07 Aug 2017

We didn't struggle to get DNA. On the scene I suspect there must have been lost of blood. Samples were optimally collected, we didn't struggle to get optimal DNA, says Otto.

07 Aug 2017

With this type of incident, there were obviously many blood stains

07 Aug 2017

216 samples submitted, farm more than what they would usually do.

07 Aug 2017

Upon request of defence, over 3000 pages of forensic evidence and SOPs handed to them by SAPS.

07 Aug 2017

Otto says there are two kinds of proficiency testing - aside form being competent, analysts much do a proficiency test at least once a year.

07 Aug 2017

Court resumes. 

07 Aug 2017

PLEASE NOTE: Judge Desai has requested certain witness testimonies not be aired - the stream will be cut from time to time

07 Aug 2017

Court breaks for lunch. Desai notes that there is a march commencing at 3pm.

07 Aug 2017

Next swab taken from axe - Rudi and Teresa in mixture DNA. Stains from shorts: single profile of Henri could be detected.

07 Aug 2017

Rudi's single profile is present on the axe. One is a mixture of Rudi and Martin.

07 Aug 2017

Rudi: duvet cover. DNA of Rudi and Martin found in mixture result in duvet cover.

07 Aug 2017

Single profiles. Third set of analysis. 

07 Aug 2017

Now on third affidavit.

07 Aug 2017

Another stain on shorts - Henri, Teresa and Rudi can be read on result.

07 Aug 2017

Teresa and Rudi's DNA is a mixture stain on Henri's shorts.

07 Aug 2017

Otto says DNA result of Henri's sample in mixture result on shorts.

07 Aug 2017

Henri's single profile - shorts.

07 Aug 2017

Marli's single profile - passage top floor and top floor in passage.

07 Aug 2017

Teresa's single profile - passage top floor, blood spatter

07 Aug 2017

Martin's profile - socks, shorts.

07 Aug 2017

Rudi's profile was found (single profile); socks, swab from blood on door, on floor in loo, floor in bathroom in room 1, shorts.

07 Aug 2017

Blood spatter results sample - Martin and Rudi matched.

07 Aug 2017

Martin's right hand nail scrapings - only profile read is that of Rudi.

07 Aug 2017

Swab with touch DNA form the handle of the knife. Profile is XY (male) only full result is that of Rudi.

07 Aug 2017

Swab which contained blood from corner of shower floor. Rudi, Teresa and Henri's DNA can be read.

07 Aug 2017

Touch DNA from axe found on stairs: DNA of Marli, Teresa and Rudi can be read.

07 Aug 2017

Next mixture result of blood from the head of the axe - male and female DNA. Teresa and Rudi's DNA can be read.

07 Aug 2017

Mixture result of blood on the bottom of axe handle - DNA of Henri can be read. There is additional DNA but not enough for her to confirm others.

07 Aug 2017

Now refers to second report, which has mixture results. Nail scrapings from Henri's left hand have Teresa, Rudi and Henri's DNA.

07 Aug 2017

Martin: XY - male. DNA on shorts.

07 Aug 2017

Teresa: XX - female. DNA from passage top floor, and sock stain matches hers.

07 Aug 2017

Marli: XX - female. blood spatter (two). Match probably 1 in every 35bn people

07 Aug 2017

Henri: XY - male. DNA on 3 cigarette butts, socks, matches his reference sample. Match probability 1 in every 261bn

07 Aug 2017

Match probability indicates how easy or difficult to find another person in SA who will leave the same DNA stain on the scene. Rudi's is 1 person in every 70bn people.

07 Aug 2017

Refers to first report. Rudi's profile is XY - male - DNA result on swab on knife; headboard, wall. Wall above headrest, carpet, swab on floor in room, spatter on wall, wall by stairs, numerous stains, duvet matches Rudi's reference samples

07 Aug 2017

PLEASE NOTE: Judge Desai has requested certain witness testimonies not be aired - the stream will be cut from time to time

07 Aug 2017

Reference samples received were marked according to the victim or a post mortem number. Complicated during comparisons.

07 Aug 2017

Lt Col Otto resumes her testimony.

07 Aug 2017

Judge Desai has revisited earlier ruling and decided Lt Col Otto's testimony will be recorded and streamed.


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