‘Solitary death’ and ‘DNA testing’.

NIPPT 孤独死とDNA鑑定

Situations in which ‘lone death’ and ‘DNA identification’ are relevant are particularly when an unidentified body is found, or when it is difficult to identify the body.In many cases of lone deaths, the family or relatives of the deceased cannot be found immediately, and DNA analysis may be used to identify the body.Below is a detailed explanation of the relationship between lone deaths and DNA identification.

1. What is a lone death?

A ‘solitary death’ is a situation where an elderly or socially isolated person dies alone, unnoticed by family or friends, and the death goes undetected for a long period of time.In such cases, the body is often found in a state of decomposition, which can make it difficult to identify the person and determine the cause of death.

Solitary death is a growing social problem, particularly in urban areas and in areas with ageing populations. When people are estranged from family and relatives, or have no friends to contact, they often die unnoticed and are discovered at a later date.

2. Identification by DNA testing

DNA testing is used in lone death cases where the body has decomposed or where it is difficult to identify the body by external appearance DNA testing is a very effective means of scientifically confirming the identity of a body.

DNA testing process.

  • Collecting DNA samples: DNA samples can be taken from blood, bones, hair, teeth and other tissues of the deceased. DNA can be extracted from hard tissues such as bones and teeth, even if they have decomposed.
  • DNA comparison with family members and relatives: identification is achieved by comparing the DNA of the body with DNA samples provided by family members and relatives.Relative DNA is commonly used to confirm parent-child or sibling relationships.

Identification by DNA testing is used particularly in forensic situations and provides strong evidence to determine who the body is.The test results are used to notify relatives and for legal procedures (death registration and inheritance).

3. In the case of unidentified bodies

In some lone deaths, especially where there are no family members or relatives, or where the person is missing.In these cases, DNA testing can play a crucial role.

  • Missing person matching: Identification is achieved by comparing DNA samples provided by the family of a missing person with DNA from a body that has died alone. This may confirm the death of a missing person who has been found or who has been searched for a long time.
  • Unknown family members: if a family member or relative does not have a DNA sample, other clues need to be looked for to confirm the identity of the body.For example, fingerprints, dental records and past medical records may be utilised, but DNA identification is considered the most reliable method.

4. Legal procedures and the use of DNA testing

Once a lone death has been discovered and the body identified, the following legal procedures can proceed

  • Notification of death: in order to register a death, the body must be identified; after identification by DNA analysis, the death is officially registered and legally confirmed.
  • Inheritance and estate handling: if a person who has died alone has left an estate, identification through DNA testing is also involved in the inheritance process.If survivors are found, the inheritance process can proceed, but if there are no survivors, the estate may belong to the national treasury.

5. Social and ethical issues.

There are also social issues associated with lone deaths and DNA testing. In particular, the following issues are discussed

  • Rise in lone deaths: the increasing number of lone deaths is a major social problem in an ageing society.Increasingly, people are dying in isolation, with fewer connections to their families and communities, and social support is needed to address this.
  • Ethical issues: the privacy and rights of the deceased and surviving family members need to be protected when carrying out DNA testing. If the surviving family members do not consent to DNA testing, or if the deceased’s wishes are unknown, it may be ethically problematic to proceed with the test.

6. The handling of human remains and the importance of DNA testing

Police and forensic experts are usually involved when the body of a lone victim is found.In these processes, DNA identification is used as a reliable and trustworthy means of identification. DNA may be almost the only means of identification, especially when the body is decomposed or when it is difficult to identify the body by external appearance.


Summary

‘Solitary death’ and ‘DNA identification’ are very closely linked in the identification of bodies. If the body of a lone deceased is decomposing, or if family members or relatives are distant or unreachable, DNA analysis can be used as an important means of identification. This allows legal proceedings to proceed, the surviving family members to be notified and inheritance issues to be dealt with.

The increase in lone deaths is a social issue, and while DNA identification technology can contribute to solving these problems, it is important that ethical issues are taken into consideration as well.

Supervisor of the article


Dr. Hiroshi Oka

Director of CAP Laboratory

Graduated from Keio University, Faculty of Medicine

Doctor of Medicine

Medical Doctor