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bnRep (version 0.0.3)

disputed2: disputed Bayesian Networks

Description

A template Bayesian network for combining forensic evidence on an item with an uncertain relation to the disputed activities.

Arguments

Value

An object of class bn.fit. Refer to the documentation of bnlearn for details.

Format

A discrete Bayesian network for the evaluation of transfer evidence given activity level propositions considering a dispute about the relation of an item to one or more activities (Figure 3). The probabilities were given in the referenced paper. The vertices are:

BGFibers

Background on fibers matching Y top on sweater (false, true);

BGU

Background DNA U on sweater (false, true);

CaseFind

Case findings on sweater (false, true);

DNAfind

DNA findings on sweater (DNA X, DNA U, DNA X + U, No DNA);

DNAU

DNA U present on sweater (false, true);

DNAX

DNA X present on sweater (false, true);

FiberFind

Fiber findings on sweater(false, true);

FibersSweater

Fibers matching Y garment on sweater (false, true);

ItemProposition

Sweater worn by offender during incident (false, true);

Prop

Who strangled person Y? (H1, H2);

TPRaltactX

Transfer of DNA X from X to sweater via X wearing sweater two weekd before incident (false, true);

TPRUstrangledY

Transfer of DNA U from U to sweater via U strangling Y (false, true);

TPRXstrangledY

Transfer of DNA X from X to sweater via X strangling Y (false, true);

TPRYtoSweater

Transfer of fibers from Y top to sweater during incident (false, true);

UstrangledY

Unknown person strangled person Y (false, true);

Xaltact

X wore sweater two weeks before incident (false, true);

XstrangledY

Mr. X strangled person Y (false, true);

References

Vink, M., de Koeijer, J. A., & Sjerps, M. J. (2024). A template Bayesian network for combining forensic evidence on an item with an uncertain relation to the disputed activities. Forensic Science International: Synergy, 9, 100546.