{"id":234,"date":"2007-01-31T09:30:15","date_gmt":"2007-01-31T09:30:15","guid":{"rendered":"http:\/\/www.jpyro.com\/wp\/?p=234"},"modified":"2007-01-31T09:30:15","modified_gmt":"2007-01-31T09:30:15","slug":"forensic-testimony-%e2%80%9cmatches%e2%80%9d-an-over-inference-of-data-a-giglio-obligation","status":"publish","type":"post","link":"https:\/\/www.jpyro.co.uk\/?p=234","title":{"rendered":"Forensic Testimony: \u201cMatches\u201d, An Over-Inference of Data? A Giglio Obligation?"},"content":{"rendered":"<p><font face=\"TimesNewRoman\"><strong>Frederic Whitehurst<\/strong><\/font> <\/p>\n<p align=\"left\"><strong>ABSTRACT:<\/strong> The expert witness who over-infers his data through the misuse of adjectives of comparison opens himself up to cross-examination that can and will discredit his work product. This paper uses the example of forensic analysis of black powder explosive to demonstrate that one can not categorically &ldquo;match&rdquo; one Black Powder sample to another or very often one complex chemical system to another and that even if this were possible, such &ldquo;matches&rdquo; may have limited probative value. The paper also explores the legal obligation of the expert to reveal to the prosecutor, court and trier-of-fact the limitations of the probative value of the evidence where those limitations might be considered to be exculpatory information.<\/p>\n<p align=\"left\"><strong>Keywords:<\/strong> Black Powder, forensic analysis<font face=\"TimesNewRoman\"><font face=\"TimesNewRoman,Bold\"><strong><font face=\"TimesNewRoman\">,<\/font><\/strong><\/font><\/font><\/p>\n<p> <font face=\"TimesNewRoman\"><font face=\"TimesNewRoman,Bold\"><font face=\"TimesNewRoman\"><strong><\/p>\n<hr \/>\n<p><\/strong><strong>Ref:<\/strong> JPyro, Issue 11, 2000, pp53-62<br \/> (J11_53)<\/font><\/font><\/font><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Frederic Whitehurst ABSTRACT: The expert witness who over-infers his data through the misuse of adjectives of comparison opens himself up to cross-examination that can and will discredit his work product. This paper uses the example of forensic analysis of black powder explosive to demonstrate that one can not categorically &ldquo;match&rdquo; one Black Powder sample to &hellip;<br \/><a href=\"https:\/\/www.jpyro.co.uk\/?p=234\" class=\"more-link pen_button pen_element_default pen_icon_arrow_double\">Continue reading <span class=\"screen-reader-text\">Forensic Testimony: \u201cMatches\u201d, An Over-Inference of Data? A Giglio Obligation?<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2,29],"tags":[],"_links":{"self":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/234"}],"collection":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=234"}],"version-history":[{"count":0,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=\/wp\/v2\/posts\/234\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jpyro.co.uk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}