Trace evidence analysis
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MISSISSIPPI CRIME LABORATORY |
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DATE ANALYSIS PERFORMED: Andrew Needham, FTEE |
Analysis: Trace Evidence Examination ** RUSH ** |
SUMMARY REPORT OF FORENSIC ANALYSIS |
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Case Description: |
Case # |
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Investigative Agency: |
Investigating Officer(s): |
The following evidence collected during the autopsy of Kristal Waterson was analyzed with the results shown.
Note: Some findings have been condensed and/or simplified for inclusion in this report.
Areas of the body were swabbed (in duplicate) and submitted for trace analysis using LC-MS and FT-IR. One of each of the swabs was extracted with dichloromethane and water to obtain organic (O) and aqueous (A) extracts, respectively.
The duplicate swabs were stored for future analysis if needed.
Aqueous Extract Analysis
| Item | Description | Findings |
|---|---|---|
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004378-B001A |
swab from behind right ear |
Positive for hypochlorite (LC-MS) |
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004378-B002A |
swab from behind left ear |
Positive for hypochlorite (LC-MS) |
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004378-B003A |
swab from left upper arm |
Positive for hypochlorite (LC-MS) |
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004378-B004A |
swab from right upper arm |
Positive for hypochlorite (LC-MS) |
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004378-B005A |
swab from left breast |
Positive for hypochlorite (LC-MS) |
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004378-B006A |
swab from right breast |
Positive for hypochlorite (LC-MS) |
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004378-B007A |
swab from abdominal area |
Positive for hypochlorite (LC-MS) |
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004378-B008A |
swab from back area |
Positive for hypochlorite (LC-MS) |
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004378-B009A |
swab from left buttock |
Positive for hypochlorite (LC-MS) |
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004378-B010A |
swab from right buttock |
Positive for hypochlorite (LC-MS) |
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004378-B011A |
swab from left inner thigh |
Positive for hypochlorite (LC-MS) |
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004378-B012A |
swab from right inner thigh |
Positive for hypochlorite (LC-MS) |
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004378-B013A |
swab from left foot |
Positive for hypochlorite (LC-MS) |
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004378-B014A |
swab from right foot |
Positive for hypochlorite (LC-MS) |
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004378-B015A |
vaginal swab |
No detectable analytes |
Hypochlorite is found in standard household bleach.
Organic Extract Analysis
| Item | Description | Findings |
|---|---|---|
|
004378-B001O |
swab from behind right ear |
No detectable analytes |
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004378-B002O |
swab from behind left ear |
No detectable analytes |
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004378-B003O |
swab from left upper arm |
No detectable analytes |
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004378-B004O |
swab from right upper arm |
No detectable analytes |
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004378-B005O |
swab from left breast |
No detectable analytes |
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004378-B006O |
swab from right breast |
No detectable analytes |
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004378-B007O |
swab from abdominal area |
No detectable analytes |
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004378-B008O |
swab from back area |
No detectable analytes |
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004378-B009O |
swab from left buttock |
No detectable analytes |
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004378-B010O |
swab from right buttock |
No detectable analytes |
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004378-B011O |
swab from left inner thigh |
No detectable analytes |
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004378-B012O |
swab from right inner thigh |
No detectable analytes |
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004378-B013O |
swab from left foot |
No detectable analytes |
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004378-B014O |
swab from right foot |
No detectable analytes |
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004378-B015O |
vaginal swab |
Positive for polydimethylsiloxane (PDMS) |
Microscopic examination of the vaginal swab yielded no spermatozoa. The positive presence of PDMS (a lubricant in Trojan latex condoms) is consistent with the lack of spermatozoa. Analysis for nonoxynol-9 (spermicide) was negative. Swab samples were retained for subsequent spectroscopic analysis if necessary.
Infrared Spectroscopic Analysis of 004378-015O
Infrared Spectroscopic Analysis of PDMS (CAS# 9016-00-6)
obtained from Sigma Chemical Company as Positive Control
PDMS (polydimethylsiloxane)
