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likeLTD (likelihoods for low-template DNA profiles)

likeLTD is an R package for computing likelihoods for DNA profile evidence, including complex mixtures and when profiles are subject to dropout. See

likeLTDguide.pdf (Version 6.2, April 2017)

which gives information on installing and running, an illustrative analysis, a description of the model, validation study, version history and acknowledgments.  Version 6.1 incorporates very big speed-ups of Version 6.  The above Guide only covers the new peak height model, for the discrete model (which remains in Ver 6 and 6.1 essentially unchanged from Ver 5.5), see the previous guide:

likeLTDguide.pdf (Ver 5.5, March 2015)

For an example witness statement illustrating how likeLTD results can be presented in court, see

Sample witness statement using results from  likeLTD

likeLTD is a team effort, early versions were coded by David Balding, Adrian Timpson and the UCL Research Software Development Team, in particular Mayeul d'Avezac, contributed much to versions 4 and 5, while the peak height model in Ver 6 has been developed and coded by Christopher Steele.

To be advised of any further changes to the program or documentation, subscribe to the e-mail list at

https://www.mailinglists.ucl.ac.uk/mailman/listinfo/likeltd

I expect only a handful of e-mails per year.  Anyone can subscribe or unsubscribe at any time.

A publication describing Ver 6.0 and presenting validation results is:
For Versions 5 through 5.5 the most relevant publication is

which gives a description of the statistical model, and examples of analyses of real cases and results from simulations.  Other relevant publications:

Please send comments and report any bugs to Chris Steele at c.steele.11@ucl.ac.uk
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David Balding,
17 Mar 2015, 15:06
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David Balding,
5 Jun 2016, 15:00
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David Balding,
23 Feb 2016, 13:13
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David Balding,
6 Jun 2017, 15:38
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David Balding,
27 Jul 2015, 06:11
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