Cell Phone Forensics
Cell Phone Record Analysis Report from actual case Missouri vs. Schindler
Explanation of RTT, NELOS, Truecall records
Murder Case Analysis to Limit and Exclude Cell Phone Records
Vehicle Accident Case Report - Defending driver accused of web browsing
Guide for Cell Phone Company Subpoena
Published article "Cellphone Forensics - Accessing and Extracting Cellphone Information" in the National Association of Defense Lawyers (NACDL) publication The Champion dated June 2021
Published article "Determining RF Coverage in Criminal Cases" in the National Association of Defense Lawyers (NACDL) publication The Champion
State of Indiana (Mushroom poisoning murder)
State of Indiana (Quadruple homicide)
State of Indiana (First degree murder)
Auto Accident - Texas (Distracted driver)
Auto Accident - Florida (Texting while driving)
State of Michigan (Stalking)
State of Michigan (Attempted Murder)
State of Wyoming (Kidnapping and Sexual Abuse)
Savannah, Georgia (ATF case - attempted murder with incendiary device)
Shawnee County, KS (Post-conviction murder)
Wireless and Forensic Training
Cellphone extraction – Cellubrite online training
Cell phone tower record analysis – Envista in class training
CDMA, GSM, 2G, 3G, 4Gm 4G – Qualcomm online and in class training
Mapping software, Excel, Database analysis, presentation software, software scripting/programming
Self Training – Many years field testing, troubleshooting, designing wireless networks
E911 location, GPS technology, location technologies – combined theoretical/practical
WiFi technology – Online courses through AirMagnet
Radio theory and implemention – Motorola
Radio spectrum rules and allotments - FCC
Cell Tower Record Analysis
Call detail and location records are obtained from the wireless network providers. We help you generate a subpoena to obtain the exact parameters to request. These records are analyzed in order to determine exact location.
Knowledge of how a cellular network functions is critical to performing an accurate and correct analysis of the data. With over 35 years of experience testing, designing and troubleshooting wireless networks our technical knowledge of wireless functionality is unmatched by other experts.
Location can be determined for outdoor as well as indoor venues. Wi-Fi, Bluetooth and other wireless data can be combined with cellular data in order to enhance the resolution further, in some cases determining the exact floor and location within a building.
Download article "Determining RF Coverage in Criminal Cases" published in the National Association of Defense Lawyers (NACDL) publication The Champion
Cell Phone Data Extraction and Cloud/Social Media Account Analysis
The cellphone and associated cloud and social media accounts provides access to a wealth of information about its user. With the right tools and procedures, data can be extracted from the phone that provides a complete profile of its user with evidence to either incriminate or exonerate the defendant in civil or criminal cases. Data can be obtained through subpoena for the phone user's cloud and social media accounts.
We extract user data from the cell phone and analyze social media and cloud data including text messaging, browsing history, call history, location history, photos, videos, social media, calendar events, WiFi networks, passwords, credit card numbers, contacts, Tasks, etc.
We provide a detailed report of the cell phone user data including all pertinent events during the time and in the location of the incident for either criminal or civil cases.
Download article "Cellphone Forensics" published in the Texas Bar Journal
Truck or Auto Accident Cases
Trucking accidents can be catastrophic and gathering and interpreting cell phone and GPS tracking evidence could be critical to a case. The data may help prove what really happened and who was at fault.
Cell phones today contain a tremendous amount of data. This data comes in many forms; text messages, emails, call activity, videos, photos, and other forensic artifacts. It can be used to create a timeline of activity surrounding when an accident occurred. It is also possible to recover extensive data believed to be deleted, as well as other obscure types of data such as if a user was using a hands-free technology while on a call, typing, searching on the phone, or watching movies. Data from the GPS tracking systems on commercial vehicles can be used for identifying the path and time driven.
Typically, because the data is in raw form when received from the cell phone, network and GPS unit, an expert must be used to interpret it. This typically includes having the expert show, on maps, tables and photos, the location information, calling numbers, messages, photos, etc. In addition, the expert will be needed to describe the wireless and location technologies used, its accuracy and any other information necessary to show its relevancy to the issue at hand.
Valuable information can also be obtained from the Vehicle Data Recorder (VDR), vehicle diagnostics port and the vehicle entertainment and mapping system. Critical data such as speed/acceleration prior to impact, vehicle location, airbag deployment, impact location, sensor status, etc. This can help complete the picture of the accident events and causes.
ZK Services has been drive and walk-testing cellular, WiFi and public safety networks for over 35 years. Our history is in testing wireless networks and understanding radio frequency (RF) coverage and wireless network functionality.
Our engineers are certified in 2G, 3G, 4G, 5G, GPS and E911 location technologies. We assist large cell phone operators in improving coverage, reducing interference, increasing data rates and overall performance and signal quality.
In legal cases our engineer will visit the event location and perform a detailed drive or walk test to determine actual cell tower coverage. This data is then compared with CDR and location records provided by the cell phone operator as well as data extracted from the phone to determine a high degree of location resolution.
These methods have been used in wireless engineering for decades and are technically proven satisfying Frye and Daubert requirements.