INDIGENT DEFENSE OFFICE, COUNTY OF RIVERSIDE
INVESTIGATOR REFERRAL LIST
The following investigator referral list is provided as a courtesy only. Listed persons are not court employees. No judicial officer, employee, agent
or representative of the court warrants the accuracy of the information contained in this directory, endorses the services of any person(s) and/or
entity named herein, or vouches for their ability.
Investigator Name Contact Information License No. Bilingual WILL ACCEPT APPOINTMENTS IN THE FOLLOWING REGIONS
Acosta, Edward C. Acosta Investigative Services PI 12843 Spanish Desert (Blythe)
P.O. Box 561 Western
Chino, CA 91710 Mid-County
(909) 590-0555 Business
(909) 590-0555 Fax
(909) 263-2705 Cell
COLUMBOED@MSN.COM
Adams, Gary L. GLA Investigations, LLC PI 189544 Desert (Indio)
23905 Clinton Keith #114 Western
Wildomar, CA 92595 Mid-County
(951) 704-5488 Cell
GLAINV23@GMAIL.COM
Allard, James Strongarm Investigations Group, Inc. PI 125764 Desert
300 S. Highland Springs Ave., #6C-260 Western
Banning, CA 92220 Mid-County
(714) 612-8309 Cell
(951) 381-4651 Fax
STRONGARMPI@GMAIL.COM
Ammons, Claude ACI (Astute Criminal Investigations) PI 26978 Desert
4193 Flat Rock Drive, Bldg. 200 Western
Riverside, CA 92505 Mid-County
(909) 376-5609 Business
(909) 972-9639 Fax
(909) 376-5609 Cell
CLAUDE@DETECTIVE4YOU.COM
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INDIGENT DEFENSE OFFICE, COUNTY OF RIVERSIDE
INVESTIGATOR REFERRAL LIST
Investigator Name Contact Information License No. Bilingual WILL ACCEPT APPOINTMENTS IN THE FOLLOWING
REGIONS
Aragón, Raquel P.I. Aragón Professional Investigations PI 28625 Spanish Western
3380 La Sierra Ave., Suite 104 #371 Mid-County
Riverside, CA 92503
(951) 347-0471 Cell
RAQUEL@MYINVESTIGATORARAGON.COM
Cespedes, Carlos M. CTC Investigations PI 189597 Spanish Desert
2209 E. Alden Ave. Western
Anaheim, CA Mid-County
(714) 404-6353 Business
CESPEC01@OUTLOOK.COM
DiMatteo, Michael A. DiMatteo and Associates PI 26005 Desert
P.O. Box 3385 Western
Beaumont, CA 92223 Mid-County
(800) 822-3880 Ext. 100 Business
(877) 897-8310 Fax
(951) 453-3930 Cell
MIKED@CALIPI.NET
Duran, Christina Amatrix Investigations PI 27822 Spanish Desert
30818 Wealth Street, UNIT I-13 Western
Murrieta, CA 93563 (Mailing Address) Mid-County
4480 Main St., Suite C
Riverside, CA 92501 *Unable to accept cases involving sex crimes
(858) 663-5546 Business against minors.
Fax through Email
AMATRIXINVESTIGATIONS@GMAIL.COM
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INDIGENT DEFENSE OFFICE, COUNTY OF RIVERSIDE
INVESTIGATOR REFERRAL LIST
Investigator Name Contact Information License No. Bilingual WILL ACCEPT APPOINTMENTS IN THE FOLLOWING
REGIONS
Jackson, Carlos The Nicholas Group Investigations PI 28414 Desert
2105 Foothill Blvd., Suite B146 Western
La Verne, CA 91750 Mid-County
(714) 794-8813 Business
(310) 948-0347 Cell
TNGINVESTIGATIONS@GMAIL.COM
Kasprzyk, Marek Marek Kasprzyk Investigations PI 23865 Desert
P.O. Box 269 Western
Riverside, CA 92502 Mid-County
(951) 235-6250 Business
(951) 274-0027 Fax
(951) 235-6250 Cell
MJKINVESTIGATIONS@YAHOO.COM
Lopez, Sergio SJL Investigations PI 24532 Spanish Desert
835 N. Main Street, Ste. D Western
Corona, CA 92880 Mid-County
(657) 777-3607 Business
(657) 502-8890 Cell
INFO@SJLINV.COM
Lozano, Alfonso ACL Private Investigations PI 28042 Spanish Western
P.O. Box 8493
Long Beach, CA 90808
(562) 400-7917
ALFONSOCLOZANO@GMAIL.COM
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INDIGENT DEFENSE OFFICE, COUNTY OF RIVERSIDE
INVESTIGATOR REFERRAL LIST
Investigator Name Contact Information License No. Bilingual WILL ACCEPT APPOINTMENTS IN THE FOLLOWING
REGIONS
McDonagh, Michael McDonagh Investigations PI 27157 Western
78-365 Highway 111 #271
La Quinta, CA 92253
(909) 262-6080 Cell
MCDONAGHINVESTIGATIONS@YAHOO.COM
Najar, Mohammed Najar Investigations PI 187816 Western
23811 Washington Ave., Suite C110286 Mid-County
Murrieta, CA 92562
(951) 834-6766 Cell
MNAJAR@NAJARINVESTIGATIONS.US
Nguyen, John Nguyen Investigations PI 18509 Vietnamese Western
P.O. Box 1521 Mid-County
Chino Hills, CA 91709
(909) 724-8398 Cell
JOHN@NGUYENINV.COM
Tiburzio, Frank Tiburzio Investigations Inc. PI 189804 Western
42259 Clairissa Way Mid-County
Murrieta, CA 92562
(951) 543-2317 Cell
FRANKATIBURZIO@GMAIL.COM
TIBURZIOINVESTIGATIONS@GMAIL.COM
Tzinberg, John Tzinberg Investigations PI 188175 Desert
41555 Cherry St., Ste. L Western
Murrieta, CA 92562 Mid-County
(949) 945-0330 Cell
JOHN@TZINBERGPI.COM
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INDIGENT DEFENSE OFFICE, COUNTY OF RIVERSIDE
INVESTIGATOR REFERRAL LIST
Investigator Name Contact Information License No. Bilingual WILL ACCEPT APPOINTMENTS IN THE FOLLOWING
REGIONS
Walters, Patrick Point Blank Investigations PI 25981 Desert
P.O. Box 591 Western
La Mirada, CA 90637 Mid-County
(657) 845-3050 Cell
POINTBLANKINVESTIGATION@GMAIL.COM
Revised 01/15/2025
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