Jonathan Whitaker - DNA Expert

jonathan whitaker

Jonathan Whitaker – DNA Expert


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Telephone: +44 (0) 787 966 7122

Jonathan is a dedicated, highly experienced, leading DNA expert. In March 2012 he became director of Jonathan Whitaker – Principal Forensics Ltd and is a co-director of Principal Forensic Services Ltd.



SUPPORTING THE DEFENCE AND OTHER STAKEHOLDERS IN THE                                                                                                                   CRIMINAL JUSTICE SYSTEM

DNA profiling and DNA profile interpretation can be a complex and somewhat daunting subject and it is often difficult to see the wood for the trees:

Low template DNA 

Y STR DNA profiling

DNA mixtures


 DNA transfer 

 DNA persistence


Mitochondrial DNA

 In the context of each individual case, Jonathan’s experience of over 24 years as a leading forensic DNA practitioner enables him to get straight to the root of the issues, break them down into manageable pieces and explain them to all parties in a simple, clear and concise manner.

Preview career summary here Preview bibliography here Preview career achievements here Preview notable cases here

In his capacity as a DNA expert, Jonathan will seek to address three main questions which pertain to most forensic cases involving DNA evidence:

1) Whose DNA is it?

2) How did the DNA get there?

3) Has the DNA profile result been reported in a fair and balanced way?

On your instruction, and on a case by case basis, Jonathan will perform an independent interpretation of the DNA profiling results and consider the following relevant points to ensure that any conclusions reached regarding the evidence, in relation to these questions,  are robust and reliable and stand up to expert scrutiny.

Whose DNA is it? How did the DNA get there? Has the DNA profile been reported in a fair and balanced way?
Has the DNA profile been interpreted correctly? Issues relating to the time of deposition of the DNA profile: addressing ‘when’ the DNA was deposited Does the work fully address the relevant issues?
Do Low Template DNA issues apply? Issues of DNA transfer: addressing ‘how’ the DNA got there Does the report consider both the prosecution and the defence alternatives?
Do the DNA profiles match? Issues of DNA persistence: addressing ‘how’ long the DNA has been there Have any limitations been clearly explained?
Has the DNA profile been attributed to a body fluid? Have different DNA transfer scenarios been proposed and evaluated? Have the scientific methods used been appropriately validated?
Has the DNA profile been evaluated correctly either statistically or subjectively? Are the conclusions robust and reliable and reported in the context of the case circumstances?

Jonathan, prides himself on delivering a competitively priced, high quality service and offers FREE ADVICE on enquiry. He receives instruction from the defence and prosecution authorities in the UK and from equivalent criminal justice partners overseas. 

As part of the Principal Forensic Services group, Jonathan continually works  to improve the quality and standards of DNA profiling processes and strives to improve understanding of the scientific issues to all through effective communication and training.

Jonathan’s portfolio of services also covers:

DNA training


Cold case review

Y STR DNA profiling

DNA expert witness

 DNA quality investigations

Development of standards

 Low template DNA specialist

Familial Searching

Jonathan Whitaker can be contacted at: or telephone +44(0) 787 966 7122