Trace evidence analysis

MISSISSIPPI CRIME LABORATORY

DATE ANALYSIS PERFORMED:
  10/10/2018

Andrew Needham, FTEE
Jackson Laboratory
Jackson, MS 39205
601-987-XXXX (FAX 601-987-XXXX)

Analysis: Trace Evidence Examination

     ** RUSH **

SUMMARY REPORT OF FORENSIC ANALYSIS

Case Description:
Kristal Waterson death investigation

Case #
005191-07J-2018

Investigative Agency:
Yoknapatawpha County Sheriff's Department

Investigating Officer(s):
Det. S. Murphy, Det. T. Armstrong

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

ItemDescriptionFindings

005191-B001A

 swab from behind right ear

Positive for hypochlorite (LC-MS)

005191-B002A

 swab from behind left ear

Positive for hypochlorite (LC-MS)

005191-B003A

 swab from left upper arm

Positive for hypochlorite (LC-MS)

005191-B004A

 swab from right upper arm

Positive for hypochlorite (LC-MS)

005191-B005A

 swab from left breast

Positive for hypochlorite (LC-MS)

005191-B006A

 swab from right breast

Positive for hypochlorite (LC-MS)

005191-B007A

 swab from abdominal area

Positive for hypochlorite (LC-MS)

005191-B008A

 swab from back area

Positive for hypochlorite (LC-MS)

005191-B009A

 swab from left buttock

Positive for hypochlorite (LC-MS)

005191-B010A

 swab from right buttock

Positive for hypochlorite (LC-MS)

005191-B011A

 swab from left inner thigh

Positive for hypochlorite (LC-MS)

005191-B012A

 swab from right inner thigh

Positive for hypochlorite (LC-MS)

005191-B013A

 swab from left foot

Positive for hypochlorite (LC-MS)

005191-B014A

 swab from right foot

Positive for hypochlorite (LC-MS)

005191-B015A

 vaginal swab

No detectable analytes

Hypochlorite is found in standard household bleach.

Organic Extract Analysis

ItemDescriptionFindings

005191-B001O

 swab from behind right ear

No detectable analytes

005191-B002O

 swab from behind left ear

No detectable analytes

005191-B003O

 swab from left upper arm

No detectable analytes

005191-B004O

 swab from right upper arm

No detectable analytes

005191-B005O

 swab from left breast

No detectable analytes

005191-B006O

 swab from right breast

No detectable analytes

005191-B007O

 swab from abdominal area

No detectable analytes

005191-B008O

 swab from back area

No detectable analytes

005191-B009O

 swab from left buttock

No detectable analytes

005191-B010O

 swab from right buttock

No detectable analytes

005191-B011O

 swab from left inner thigh

No detectable analytes

005191-B012O

 swab from right inner thigh

No detectable analytes

005191-B013O

 swab from left foot

No detectable analytes

005191-B014O

 swab from right foot

No detectable analytes

005191-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 005191-015O
Infrared Spectroscopic Analysis of 005191-0150

 

Infrared Spectroscopic Analysis of PDMS (CAS# 9016-00-6)
obtained from Sigma Chemical Company as Positive Control

Infrared Spectroscopic Analysis of PDMS (CAS# 9016-00-6) obtained from Sigma Chemical Company as Positive Control

 

PDMS (polydimethylsiloxane)
PDMS (polydimethylsiloxane)


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