Murder trial of Kaitlin Armstrong, who was charged in the shooting death of rising pro cyclist Anna "Mo" Wilson, ends with a guilty verdict.
www.courttv.com
11-16-23
Vehicle satellite records, phone-tracking data and surveillance video from a nearby home showed Armstrong’s Jeep driving around the apartment and parking in an alley shortly before Wilson was killed.
Data from Armstrong’s phone showed it had been used that day to track Wilson’s location via a fitness app that she used to chart her training rides.
Investigators also said shell casings near Wilson’s body matched a gun Armstrong owned.
Jurors heard the frantic emergency call from the friend who found Wilson’s body, saw the gruesome police camera footage of first responders performing CPR, and heard audio from a neighbor’s home surveillance system that prosecutors said captured Wilson’s final screams and three gunshots.
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In closing arguments, KA's defense tried to make a big deal about disparity between the vehicle tracking infotainment data and KA's cell phone location data. In other words, the vehicle GPS (Global Positioning System) is nearly always more accurate.
Vehicle tracking systems are known to use satellite or assisted GPS (A-GPS) whereas KA's phone location tracking was most likely serviced by cellular network radio signal triangulation and WIFI positioning where the
receivers can be subject to GPS drift, not generally associated with true satellite or A-GPS. MOO
Historically field data collection was a daunting task reserved for geographic information specialists ( GIS ) professionals, and the technical savvy crowd. This was largely due to the learning curve involved in operating mapping grade Global Positioning System (GPS) receivers. However, smart phon
www.communityhealthmaps.org
GPS Accuracy: There are a number of factors that affect accuracy no matter what GPS receiver is being used. The GPS radio signals encounter differing conditions while travelling through the atmosphere, causing signal delays, and therefore affecting accuracy. The geometry of the satellites being used will also vary.
The GPS will have a wider array of satellites to choose from if you're out in the middle of a big field, versus being on 6th Avenue in Manhattan. You will get better positions if the satellites you're locked onto aren't clustered in one part of the sky. Therefore the more sky view you have, the more accurate your GPS will be. In addition to blocking your view of the sky, urban canyons can also cause multipath effects, where the GPS signal bounces off of buildings or other objects reducing accuracy.
