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Welcome to Precision Simulations, the Nationally recognized leader in Forensic Analysis and Visualization. PSI has been in business since 1997, and as one of the oldest firms of its kind in the country with over 700 cases completed, PSI is a pioneer in the fields of Forensic Animation, 3D Laser Scanning and Crime & Accident Scene Documentation and Reconstruction technology. PSI services both the private litigation sector and Law Enforcement and has maintained a 100% admissions rate for our work at trial.

Verdict: Guilty of First Degree Murder - Dateline NBC in Quincy California for Wallin-Reed Trial

NBC broadcast a special two-hour Dateline segment about the murder case to a national audience on Friday, Oct. 18, at 9 p.m.

Keith Morrison and a team of NBC producers began researching, shooting video footage and conducting interviews in June.

PSI’s CEO, Craig Fries, testified to the 3D reconstruction and 3D Laser Scanning Analysis that showed that the victims were attempting to flee from their assailant at the time they were shot. Plumas County District Attorney David Hollister used the 3D graphics extensively in his closing.

Click Here to See the Entire Dateline Program


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   PSI News and Events

How Computer Animation, Laser Scanning & Reconstruction Can Help You Win at Trial, MCLE Speaker Series, Wednesday, May 7, 2014 - LA Law Library, Downtown Location. Craig Fries will present the seminar which covers Forensic Animation, Video Footage Analysis, Visability Study Analysis, 3D Laser Scanning and the Working Model.

The International Training Conference for Fire and Arson Investigators - April 14 through 18, 2014 - Las Vegas, Nevada.
Kirk McKinzie will present 3D Technologies for the Fire Investigator on Monday April 14th from 3 to 5 PM.

California Fire Chief's Association, Nor-Cal Fire Prevention Officers Monthly Meeting - February 28, 2014, Mill Valley, California. Kirk McKinzie shall present 3D Technologies for the Fire Prevention Officer, Investigator, and Life Safety Professional.

Verdict: Guilty of First-Degree Murder
On Thursday, Sept. 26, a jury found the 38-year-old Reno man guilty of murder and seven other felonies stemming from a car chase that ended in a hail of bullets from Wallin-Reed’s AR-15 assault rifle. Gregory Chad Wallin-Reed will likely spend the rest of his life in prison for the July 2011 shooting death of Rory McGuire.
Read Entire Article about the Forensic Testimony

Case Study Preview

Get a sneak preview of our next three Case Studies, make sure and check out these challenging and interesting scenarios.

August 2013, Vehicle Crush Analysis
In the analysis of vehicle accidents, one of the most important sources of insight is the physical evidence left behind in the form of vehicle deformation, often referred to as “crush”. The amount and location of the damage to the vehicles exterior and interior provide the reconstruction expert with detailed data regarding the energy expended in the collision.

The Second Annual Defense Counsel Summit, August 15, 2013, Martinez CA. Featuring Special Guest Speaker, Craig Fries.

May 2013, The Need for Measurement, Not Conjecture! 
Forensic reconstruction of vehicle accidents begins and ends with data. The accuracy, fidelity and ultimate validity of the reconstruction is limited primarily by the quality of the data available.

February, 2013 - PSI Acquires RaceLogic VBox 3i
PSI is excited to announce a powerful new addition to our Forensic Engineering Toolset – The RaceLogic VBox 3i 100Hz system with Dual-Antenna GPS. PSI’s  VBOX is a state-of-the-art vehicle dynamics measurement system, allowing the real-time measurement of forces on a vehicle, including Speed, Acceleration, Braking, Lateral forces, Slip/Yaw, Pitch and Roll. The system also logs the position of the vehicle over time via its synchronized accelerometers and Dual-Antenna GPS, and can be mounted on commercial vehicles, passenger vehicles, motorcycles and even bicycles.
The result? The most accurate, valid and highest fidelity vehicle reconstruction data available!

January, 2013 - PSI Upgrades to Leica Geosystem's ScanStation C10
PSI is proud to announce the acquisition of our new 3D Laser Scanning System - The Leica ScanStation C10. The Leica ScanStations blazing fast data capture (50,000 points/second) and unparalleled accuracy (Typical registration to within 0.001m) allow PSI to document any scene or object in 3D with the highest possible fidelity.

Continued Legal Education Accredited Training
Is your Jury looking for CSI-style Analysis & Computer Visualization? Learn how to use modern technology to present your case facts in a clear, compelling manner and Turn Your Jurors Into Witnesses by attending this Free seminar worth 1.0 hours of CA MCLE.
Click here to Schedule Yours!

  PSI Case Examples


On August 24th, 2008, CHP Officers Walling and Coffman were led on a hi-speed pursuit in the outskirts of Stockton by Joey Pinasco. The pursuit ended on a little-used dirt road when Pinasco lost control of his Chevy pickup and swerved into a drainage ditch. After giving verbal commands to Stop! Show me your Hands! Officer Coffman positioned himself near the front of the Chevy and Officer Walling approached the Chevy and knocked on the window. At this time Pinasco pressed the accelerator and began spinning his tires and heading towards officer Coffman, causing both officers to discharge their firearms, killing Mr. Pinasco. Mr. Pinasco’s family sued the State for Violation of Mr. Pinasco’s civil rights and negligent homicide.



On June 15th, 2008 Yolo County Sheriff’s Deputy Jose Antonio “Tony” Diaz was fatally shot after a high-speed pursuit of Defendant Marco Topete.  Topete was found guilty in Yolo County Superior Court of First Degree Murder with Special Circumstances, and the Yolo County D.A.’s office asked the jury  for the death penalty.

On November 16, 2011, the jury sentenced Marco Topete to death for the Murder of Yolo County Sheriff’s Deputy Jose Antonio “Tony” Diaz. The verdict was read aloud in Department 3 before Judge Paul K. Richardson.