Crime Laboratory Presentation

City of Chandler — Work Session (2024-07-15)

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Building a Comprehensive 
Crime Laboratory
Enhancing Chandler Forensic Services
Council Work Session
July 15, 2024

Agenda
Background & History
Current State
Proposed Future State
Next Steps
Questions

Background and 
History
Chandler Police Department
Forensic Services Section

92% of survey respondents 
agree that they feel safe in 
Chandler1
“I HAVE ALWAYS HAD 
OUTSTANDING SERVICE WITH 
CHANDLER POLICE”
“FANTASTIC SERVICE FROM MY 
INITIAL CALL TO THE FOLLOW-UP 
REPORT BY THE OFFICER.  VERY 
IMPRESSED GREAT JOB ALL 
AROUND.” 
“WE FEEL VERY SAFE, THANK 
YOU TO CHANDLER PD FOR 
YOUR SERVICE AND SACRIFICE!.”
1FY24-25 Resident Budget Survey
Citizen and Spidr Tech
“MY CAR WAS STOLEN IN 
SEPTEMBER 2023. THE POLICE 
SHOWED UP IMMEDIATELY AND 
MY CAR WAS LOCATED THE 
SAME DAY.  EXCELLENT LEVEL OF 
COMMUNICATION, EMPATHY 
AND INSTILLED TRUST.

Homicide
0.18%
Forcible Rape
2.19%
Robbery
1.72% Aggravated Assault
6.68%
Burglary
8.27%
Theft
73.04%
Auto Theft
7.78%
Arson
0.13%

Crime Rate History & Trends
 -
 2,000
 4,000
 6,000
 8,000
 10,000
 12,000
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
Uniform Crime Report Part I Crime Index
1987 - 2023

Chandler Population Growth
265,200
268,313
282,628
285,078
287,357
250,000
255,000
260,000
265,000
270,000
275,000
280,000
285,000
290,000
295,000
2020-21
2021-22
2022-23
2023-24
2024-25
Population
Linear (Population)

Chief 
Chapman
“While our city's proactive 
approach to adopting advanced 
technologies and innovative 
strategies has contributed to a 
downward trend in the crime rate, 
we must continue to evolve to 
keep pace with our growing 
population and emerging 
challenges.”

Citizen Bond Exploratory Committee
Public Safety Subcommittee – Police 2020
Forensic 
Services Facility 
576 W. Pecos Rd
$38.3M
Main Station 
Renovations
$9.6M 
Emergency 
Vehicles
$1.6M
23,500 square feet recommended for Forensic Services expansion based 
upon 2014 Facilities Master Plan. 
CIB & 
Communications 
Renovations
$6.4M

Committee Recommendations  
Public Safety Subcommittee

November 2021 voters gave the 
authorization to issue bonds to fund 
capital projects planned in the 
10-year CIP

Current State

Unit 
Accomplishments
• More than a decade as an ISO 17025 
accredited Forensic Laboratory
• Recipient of the Maximus Award for six 
consecutive years, demonstrating 
sustained excellence and high efficiency.

Crime Scene Unit Personnel
10 full-time Crime Scene Technicians
2 Crime Scene Technician Leads
1 Crime Scene Supervisor 
4 cross-trained for ABIS ten print
24/7 Crime Scene Response

Forensic Analysis Unit Personnel
5 full-time Forensic Scientists
1 Forensic Scientist Supervisor 
Cross-training is not commonly adopted as an industry 
standard.
Blood Alcohol
Seized Drugs
Latent Print

Average turnaround 14 days

Average turnaround 14 days

Average turnaround 117 days

Performance Metrics
Indicator (Fiscal Year)
Curr.
YTD
Goal
Percentage of requests for blood alcohol analysis completed 
within 30 days
100%
95%
Percentage of requests for controlled substances analysis within 
60 days
100%
95%
Percentage of requests for latent print analysis within 90 days
70%
95%
Percentage of crime scene analysis report requests completed 
within 14 days
98%
95%

Crime Lab Services
Agency Provider
Crime Scene
In-House
Latent Fingerprint 
In-House
Controlled Substances
In-House
Toxicology – Alcohol 
In-House
Firearms – NIBIN Database only
In-House – non laboratory
Computer Forensics / Digital Evidence
In-House – non laboratory
Firearms / Toolmarks
Outsourced
Toxicology – Drugs 
Outsourced
Trace Evidence
Outsourced
DNA
Outsourced
Questioned Documents
Outsourced
Forensic Services

Current Facility 
Limitations 
Built in 1999
5,500 sq. ft. lab  
3,000 sq. ft. biohazard and vehicle bay
Reached capacity in 2005

Outsourcing 
Services -
Limitations

2023 Blood Drug 
Analysis

2023 DNA Analysis

DNA Analysis 
1:10
Cases in which DNA evidence is collected is submitted for 
analysis to AZDPS
Chandler experienced a significant number of property 
crimes, 10 were submitted for DNA analysis.
For Property Crimes cases, the AZDPS lab will process 1 item of evidence per suspect
with a known exemplar.

Projected 
Case 
Numbers
97
177
736
182
1204
275
0
200
400
600
800
1000
1200
1400
DNA
Toxicology
Chandler Case Projections
2023 Submissions (Outsourced)
Median Projection
High Projection

Forensic Services
Current
24/7 Crime Scene Response
Ten-Print Analysis
Blood Alcohol Analysis (DUI)
Seized Drugs
Latent Fingerprints
Key Additions
DNA
Blood Drug Analysis (DUI 
and Sex Assault)
Computer Forensics/Digital 
Evidence

Future State of Forensic Services

Evidence shows that applying 
DNA analysis to property 
crimes yields results.
• More than twice as many suspects 
are identified, arrested and accepted 
for prosecution

Computer 
Forensics / 
Digital Evidence
Freeing up Officers to 
concentrate on investigations
Standardized Practices to  
efficiently collect and analyze 
large volumes of evidence
Leverage Expertise for a reliable 
and verifiable analysis

Impact of 
Expanded 
Forensic 
Services
Firearms - Database
• The nationwide database is used to match 
ballistic evidence with other cases. 
• Guns need to be test-fired so the bullet 
patterns can be matched to those in the 
database.
• This is a chance to create a proper space for 
both test-firing guns and using the database.

Forensic 
Facility 
Benefits to 
Chandler
Supporting Forensic Needs: Committed to fulfilling 
criminal justice requirements.
Forensic Science Utilization: Developing 
investigative leads through advanced forensic 
science.
Prioritizing Investigations: Aligning with officers’ 
investigative priorities.
Expedited Testing: Providing rapid, selective 
analysis.
Public Trust: Sustaining and strengthening public 
confidence.

Feasibility 
Study 
The city conducted RFQ and selected SmithGroup to perform 
a pre-design study.
The scope of services included:
o
Facility needs and requirements
o
Adjacency to the existing Property and Evidence 
Facility
o
Potential public outreach services
o
Pre-design services
o
Preliminary cost estimate
Received $290,000 of funding in FY 2022-23 for the 
feasibility study.
The Feasibility Study was completed in FY 2023-24.

Feasibility Study 
Recommendation
29,996 Square Feet – Single Story
$59.2M
Connected to the Property & Evidence Building

Capital Budget
$5,259,000 
FY2024-25
$59,212,000  
FY2025-26
$50,081,000 from Public 
Safety Bond Fund 460  
$9,131,000 from General 
Fund 401 
Public Safety Bond 
Fund 460
Design
Construction

Next Steps

Design Phase 
FY2024-25
Continuation of 
the partnership 
with the 
SmithGroup
Design a better 
future for forensic 
services in our city

Exploring Partnerships
• Potential Partnership with Town of Gilbert
oLooking at business model, timing, cost sharing, and level of 
service expectations
oPartnership would include Maintenance & Operations,  and Capital 
from both agencies
oWill return to City Council if partnership makes sense for both 
parties

Further Considerations
CENTRAL LOCATION AND 
PROXIMITY TO PROPERTY 
AND EVIDENCE ARE 
CRITICAL
RENOVATIONS OF THE 
MAIN SUBSTATION 
CANNOT PROCEED UNTIL 
THE LABORATORY 
MOVES OUT
AGING INFRASTRUCTURE 
OF THE CURRENT 
LABORATORY & COST 
INCURRED BY 
CONSTRUCTION DELAYS
LABORATORY MOVES 
REQUIRE AN 
ADDITIONAL SET-UP 
PERIOD

Process Timeline
Process
Estimated Timeline
Continue to Explore Potential Partnerships
Ongoing
Design Services
1 Year
Construction
2 Years
Transition Period
6 – 9 Months
Fully Operational - Goal
2-3 Years

Forensic Services 
Facility
Investing in a crime lab will result in enhanced 
public safety and increased community trust.

Questions