Sections

Services

Information

UK United Kingdom

More than a hunch: identifying Richard III with DNA

In the past few days news has come to light of the confirmation that skeletal remains discovered in an excavated site of a Leicester car park are indeed that of the famous English king Richard III. But…

The skeleton of Richard III was discovered beneath a car park in Leicester, and identified using the DNA of his descendants. EPA/HO

In the past few days news has come to light of the confirmation that skeletal remains discovered in an excavated site of a Leicester car park are indeed that of the famous English king Richard III. But how was it done?

It should be noted that DNA played only a part in this puzzle, the project involved archaeologists, pathologists, genealogists and anthropologists.

It has been reported that testing produced a match with the maternal DNA of two descendants of Richard’s sister (one anonymous, and the other Michael Ibsen, a Canadian carpenter living in London). A “beyond reasonable doubt” match by all accounts.

So what does this actually mean and how can DNA be considered such a useful tool to identify the dead?

Most people who are interested in the field of forensic science would be familiar with DNA profiling. In shows such as CSI: Crime Scene Investigation it is used quickly and cleanly to great crime-fighting effect.

The reality of course is somewhat different, but in essence what you see on screen is as it occurs in the lab. The DNA used mostly in the criminal forensic realm is that termed “nuclear DNA”. This large DNA strand is found in the middle of most cells of the body, its role being to act as a blueprint for building and operating your body.

Its sequence is very unique. Your nuclear DNA is inherited in part from your father, and in part from your mother. The “letters” in their DNA codes combine to produce an approximately 3.2 billion base pair-long strand believed to be unlike anyone else’s (aside from an identical twin). It can be used to individualise biological evidence from crime scenes - effectively pinpointing an individual as the source.

The complete skeleton of Richard III as discovered in a Leicester car park. EPA/HO/University of Leicester

When identifying bloodstains from a murder, or semen from a rape, this technique can be invaluable. Being a large molecule, however, nuclear DNA is susceptible to damage, which can be fatal to the scientist’s ability to read it’s code.

This means that when evidence items or biological material has been left exposed to the elements – such as moisture, sunlight, or chemical environments - its value for unique identification can be reduced. Enter mitochondrial DNA.

Mitochondrial DNA

Mitochondria are the power-houses of the cells. They are present in virtually all cells both plant and animal. They convert energy into forms that can be used to drive cellular reactions and processes.

A portrait of the slain English king Richard III. EPA/ The Dean and Chapter of Leicester

This is the much neglected “other” DNA contained within our bodies, and it has been used effectively to identify skeletal remains from hundreds, even thousands of years past.

To make the regal link: recently mitochondrial work has been undertaken on Egyptian royal mummies from the Valley of the Kings. No less than Tutankhamen has had his familial relationships probed and documented via his mitochondrial DNA.

Moving further north, the Russian royal family (the Romanovs) were also identified after a grisly dispatch using the same process.

So why go down the mitochondrial path when nuclear DNA fails us?

In line with their functional importance, mitochondria are rewarded by both quantity and size in their cellular home. Your average cell contains hundreds or even thousands of circular mitochondrial DNA strands. This gives them an advantage over the more fragile, singular nuclear DNA. They are smaller, more robust and by weight of numbers - they are more likely to survive the slings and arrows of time and outrageous fortune.

The other advantage of mitochondrial DNA is that it is inherited solely on the maternal line. When egg and sperm combine at the moment of conception, the sperm tail containing the parental mitochondria is shed. The resulting embryo will now inherit the mitochondrial sequence from the mother. As there is no combining of codes the original sequence is (generally) maintained.

The final resting place of Richard III was discovered over 500 years after his death. HO/EPA/University of Leicester

Less change and mutation means that even many generations down the line the sequence can be compared and matched. It also means when only distant relatives (such as maternal aunts or cousins etc) can be found for matching, a result is still possible. This kind of matching with standard nuclear DNA profiling is far less discerning.

So, where does this leave us with a king and a carpenter? King Richard and his sister would have inherited the same maternal mitochondrial DNA. This has in turn been carried down the line in Michael Ibsen’s family (thank goodness there appear to be no other skeletons in his family’s closet!).

A direct comparison would have been carried out, and (perhaps allowing for minimal mutation) a match would have been detected. A statistical analysis of the frequency of the profile within a population would have been undertaken and the result was such that scientists consider his identity “beyond reasonable doubt”.

It has been quipped that there is some irony in the fact that the man Shakespeare made famous for his “my kingdom for a horse” speech should be found in a car park. That aside, it is yet another testament to the value of the technique of DNA identification that makes a DNA scientist feel all warm and fuzzy.

Further reading:
A burial fit for a king: from car park to cathedral for Richard III - Peter Sherlock, The Conversation

Sign in to Favourite

Join the conversation

10 Comments sorted by

  1. Sean Lamb

    Science Denier

    DNA forensics undoubtedly very powerful but best not used in isolation. Was there anything about this skeleton that suggested Richard III aside from being located in Leicester - a misfortune suffered by hundreds of thousands of people over the ages.
    If you want to it is very easy to cheat on DNA if you feel so inclined and my experience is that in the quest for a headline there is very little an academic won't do.
    Maybe another group should do a C14 dating - if that has not already been done - preferably a group that would have a complete chain of custody of the material.

    Was Richard III beheaded? The position of the skull in the photo above seems to suggests that.

    report
    1. Jane Devenish-Meares

      Scientist, Molecular Biology at Victorian Institute of Forensic Medicine

      In reply to Sean Lamb

      Sorry has taken me so long to respond to these comments…urgent casework calls. Sean as you say; DNA in the forensic realm is a very powerful tool. Generally speaking we are focused on STR nuclear DNA analysis, and this as a tool of discrimination can produce very powerful and compelling evidence. There are many steps in the process, some more fool-proof than others. The technology to amplify STR regions on a DNA molecule using PCR is gold standard these days. Most of this type of work is kit based…

      Read more
    1. Sean Lamb

      Science Denier

      In reply to Michael Bunce

      There does seem to be a reasonable trail of historical evidence - or at least tradition - suggesting he was buried at that site. The skeleton would suggest all the royal painters were extremely keen to flatter.

      If they really want to check I pretty sure there is his brother in Westminster or similarly suitably royal cemetary

      report
    2. Michael Bunce

      ARC future fellow researching in the fields of ancient DNA and wildlife forensics at Curtin University

      In reply to Sean Lamb

      Hi Sean, I agree there is other evidence. The thing I don't like is that DNA has be used to bring certainty to the identification (as it does in forensic casework)..... but this is a smokescreen. The 30bp mtDNA "snippet" is very weak evidence. If anything it should be used to state the fact that you can't rule out the possibility that it is a match....this is a big difference. Jane, how would you feel about presenting 30bp of mtDNA in court to "prove" a match?

      report
    3. Sean Lamb

      Science Denier

      In reply to Michael Bunce

      Actually I have changed my mind and I think it is just a hoax - the involvement of a TV project and the use of a kind of dowsing or remote sensing to locate the site - R for reserved parking place.

      There is a good documentary record of a mausoleum being built for Richard, that is presumed to have been demolished after the dissolution of the monasteries from 1535 onwards. That is at least 50 years of decay above ground in mausoleum - there is a tradition recorded that the stone coffin was later…

      Read more
    4. Jane Devenish-Meares

      Scientist, Molecular Biology at Victorian Institute of Forensic Medicine

      In reply to Michael Bunce

      Michael from what I have seen of the DNA evidence (which is very little really) it is only a small piece that backs up the other (perhaps more compelling) evidence. There is so little research available on the frequencies of mtDNA sequences in the worldwide population. It is very elegant evidence and if it didn’t match then it would be all over red rover. The fact that it matched is of some significance.

      You say that DNA evidence has been used to bring certainty to the identification. I believe…

      Read more
  2. John Newton

    Author Journalist

    Science was used to identify the bones of Richard III, but what appears to have been overlooked is that an unscientific ‘hunch’ located him.
    Philippa Langley was the culprit. She was writing a screenplay based on his life, snd had been fascinated by him sufficiently to be a leading member of the Looking for Richard Project.
    As we know, chance favours the prepared, but how to explain this (from The Guardian Febuary 5th:
    "When you're writing a screenplay, you walk 1,000 miles in their shoes every…

    Read more
  3. David Clerke

    Teacher

    I thought after the dissolution of the monasteries Richard's bones were disintered and thrown into a river? As someone said please explain.

    report