Investigating Officer(s): Det. T. Armstrong, Det. S. Murphy
Incident No.: 000073-05A-2014
Case Description: Cameron & Caitlin Maxwell Homicide Investigation

Voice samples were obtained from some persons of interest to the Maxwell investigation for assessment. Some persons of interest were not available or declined to provide samples.

Subjects were asked a series of control questions to establish baseline laryngeal microtremors affecting vocal pitch, and were then asked to say two test sentences relevant to the investigation.

These test samples were compared against the control samples to identify vocal stressors. Vocal stress frequency is said to increase relative to the baseline during possible dishonesty.

Voice stress analysis findings are not admissible in court, but can be a useful investigative tool in evaluating the veracity of a subject's verbal responses.


Todd Maxwell


voice-dad"My name is Todd Maxwell. I had nothing to do with the deaths of Cameron and Caitlin Maxwell."

Subject: Todd Maxwell 
Test Results: High Stress
Highest Frequency = 11.1 Hz
Lowest Frequency = 08.2 Hz
Average Frequency = 10.1 Hz


Stress Scale

12 Hz High Stress
11 Hz High Stress
10 Hz Average Stress
09 Hz Low Stress
08 Hz Low Stress

Results in the 11-12 Hz range is said to be an indication of dishonesty.



Crime Scene
5800 N 19th Ave Ste 103
Phoenix, AZ 85015
Voice (623) 565-8573
Fax (602)-274-7280

For Crime Scene Store inquiries:

For technical assistance:


Find us on Google+

Weekly Updates

Get weekly updates on the investigation.
      Click to view previous updates

Go to top