## Abstract

Introduction

It is usual to attach a numerical weight to a match between DNA obtained from a crime sample and DNA taken from a sample given by a suspect. In Chapter 2, we discussed the possibilities of using a frequency, an exclusion probability or a likelihood ratio (LR) for this purpose. A frequency or an exclusion probability is based on data and the result is termed an estimate. The fact that what is given is an estimate leads to the following question: Should this numerical estimate be a best estimate or should some consideration be given to the uncertainty in this estimate?

This is a matter where opinions in the forensic community differ.

It is usual to attach a numerical weight to a match between DNA obtained from a crime sample and DNA taken from a sample given by a suspect. In Chapter 2, we discussed the possibilities of using a frequency, an exclusion probability or a likelihood ratio (LR) for this purpose. A frequency or an exclusion probability is based on data and the result is termed an estimate. The fact that what is given is an estimate leads to the following question: Should this numerical estimate be a best estimate or should some consideration be given to the uncertainty in this estimate?

This is a matter where opinions in the forensic community differ.

Original language | English |
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Title of host publication | Forensic DNA Evidence Interpretation |

Editors | John S. Buckleton, Jo-Anne Bright, Duncan Taylor |

Publisher | CRC Press |

Chapter | 6 |

Pages | 181-202 |

Number of pages | 22 |

Edition | Second Edition |

ISBN (Electronic) | 9781482258929 |

ISBN (Print) | 9781482258899 |

Publication status | Published - 2016 |

Externally published | Yes |

## Keywords

- DNA casework
- Peter Gill
- DNA analysis
- Interpretation of test results
- DNA frequencies
- LCN (ultra trace) analysis
- Non-autosomal (mito, X, and Y) DNA analysis