CRIM 355 Lecture Notes - Lecture 4: Minutiae, Hair, Genetic Code

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Tentative id (cid:862)class(cid:863) evidence: description of victim portrait parle, may be many people who fit the same description. Iitteemmss aassssoocciiaatteedd wwiitthh bbooddyy oo mmaayy bbee bboorrrroowweedd,, ssttoolleenn,, ppllaanntteedd oo ccaassee hhiissttoorryy ddrriivveerrss lliicceennssee bboorrrroowweedd: mmuusstt ccoonnffiirrmm tteennttaattiivvee iidd wwiitthh aa ppoossiittiivvee mmeetthhoodd. Fingerprints at scene: llaatteenntt pprriinnttss ((nnoott vviissiibbllee)) ssoommeeoonnee ttoouucchheedd ssoommeetthhiinngg tthheenn tthhee ffiinnggeerrpprriinntt lleefftt oonn tthheerree ((wwee ccaannnnoott eeaassiillyy sseeee iitt)),, mmaaddee bbyy tthhee ddeeppoossiitt ooff ooiillss aanndd//oorr ppeerrssppiirraattiioonn 11-- iinnddiivviidduuaall cchhaarraacctteerriissttiicc: ridge characteristics (minutiae) - ridge endings, bifurcations, enclosures, and other ridge details, which must match in two fingerprints in order for their common origin to be established. 22-- uunncchhaannggeedd tthhrroouugghhoouutt lliiffee ((tthheeyy ggrrooww,, mmaayy bbee ssccaarrrreedd,, bbuutt ppaatttteerrnn rreemmaaiinnss tthhee ssaammee eegg jjoohhnn ddiilllliinnggeerr ddeessttrrooyyeedd hhiiss ffiinnggeerrpprriinnttss. 33-- rriiddggee ppaatttteerrnnss ((oonnee ooff 33 mmaaiinn ccaatteeggoorriieess;; lloooopp,, aarrcchh,, wwhhoorrll)) ccaann bbee ccllaassssiiffiieedd: ridge ( groove) is the black ink line when we press our finger on the paper.

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