Case of the Trampled Teen

Last updated
Save as PDF

Page ID: 66754

Contributor
Analytical Sciences Digital Library

\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\)

Forward to the Case Report (Student Pages)

Major Evidence	Techniques	Set Up for a Particular Case *
Blood Samples from Rebecca Ferris from Bradley Kimmer	Gas chromatography (ethanol) Gas chromatography - mass spectrometry (drugs)	Ferris: ethanol (0 g/100 mL) ; cocaine (750 ng/mL) Kimmer: ethanol (0.2 g/100 mL) ; cocaine (125 ng/mL)
Fabric Samples from S. Argones' car from Peter Bredon's car from Brad Kimmer's car from R. Ferris' shirt	Visible diffuse reflectance spec. (color) FT-Raman spec. (composition)	Argones: 100% cotton Bredon: 65/35 cotton/polyester Kimmer: 50/50 cotton/polyester Ferris: 50/50 cotton/polyester
Glass Samples from S. Argones' car from Peter Bredon's car from Brad Kimmer's car from crime scene	Microscopy, refractive index tests Atomic absorption spectrophotometry (Mg)	Crime scene: several pieces of bottle glass, several pieces of headlamp glass from Kimmer's car, one piece of windshield glass of the type found in Bredon's car
Swab of Rebecca Ferris' shoes	Solid phase extraction & Liquid chromatography (follow procedures described in explosives section)	Atrazine (a common herbicide) found on victim's shoes, indicating she had exited the corn field before entering the roadway.
White Powder from Peter Bredon	Infrared spec. (bulk drug)	Mixture of starch and caffeine ("cocaine")

* ONE POSSIBLE SCENARIO: Rebecca Ferris, high on cocaine makes her way through a corn field before stepping onto a country road. Bradley Kimmer, intoxicated with alcohol and drugs and driving at high speed, collides with and kills Rebecca. He leaves her by the side of the road and drives on.