Forensic Engineers and Consultants

Tag Archive: crash data recovery

  1. Stan

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    “What’s up man, you want to hit up the Longbranch tonight? Cool, I’ll get up with you later.” Ronnie ends the call and heads out on a beer run. After the last sip of Gin, Stan finishes up one of his many fan letters, drops it in the box, and starts to get ready for the night. “What’s good?” It was Ronnie’s cousin Squirrel on the line. “You okay with Stan going tonight?”  “Yeah,” Squirrel says, “he’s got a sweet ride… we’ll let him drive! He let me drive that GT all last week, that thing is hot!” “Sounds like a plan! Let me go dude, bout to head in and get some cold beer.”

    “911, what’s the nature of your emergency?“

    “Yes, there is an overturned car, looks like maybe a Mustang, a red Mustang. I’m just off Highway 9. It’s down an embankment…I can see two people laying on the ground and one person still in the car. The two people on the ground are moving, but the one in the car looks bad!”

    “Police and EMS are on the way ma’am.“

    “Okay, I have my emergency flashers on, can you stay on the phone with me until they get here… it’s really dark and cold. I’m scared.”

    “I’m here ma’am, try to calm down. Can you give me a description of the people involved, maybe what they’re wearing?“

    “The one that’s lying near the car is wearing red jeans with a white T-shirt, and it looks like he has a black and green high-top sneaker on his left foot only, just a sock on the other. The other one out of the car has regular blue jeans on, and a green shirt with boots. It’s hard for me to see the guy in the car… looks like he has on jeans and some kind of black concert T-shit, I can see tour dates and make out the word “Shady”. Hey, the police are here, so I’ll hang up now.”

    A lot is at stake here and we have quite a dilemma, three occupants involved in a single vehicle crash with one fatality and no idea who the driver is. The stakes begin to rise immediately, at the scene of the crash. What’s documented or not documented will affect the outcome of this case. It will affect the outcome of this case when everyone has gathered with suit and tie, when hands are placed on the Bible, and the truth is sworn to be told.

    We’ve talked about proper collision scene documentation several times, but this time let’s talk about a few ways we can build a case like this and possibly identify beyond a reasonable doubt who was driving at the time of the wreck. (more…)

  2. The Middle Car Blues

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    Maybe you, a loved one, or even a client, have been in the unfortunate position, no pun intended, of being the creamy center in a three-car wreck. Odds are high that you have not, but those odds are also equally high that if you have, you will be shown as one of the contributors to the collision. In other words, the wreck will likely be your fault-and possibly the fault of the person behind you as well. Sure, the wreck could be the fault of the middle and third cars… that wreck would look something like this; (more…)

  3. The Vehicle (EDR)

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    In a previous blog post, we began to delve a little deeper into the vehicle aspect of the 9-Cell Collision Matrix by taking a look at tires. Let’s now take a closer look at the very diverse and interesting topic of Event Data Recorder (EDR) data. (more…)

  4. The Collision Reconstruction Matrix

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    It’s mid-January, the high today is 28 degrees with lows in the teens as the Carolinas are in the grip of a Canadian cold front and I’m on call tonight. The phone rings at 3:00 am; yes Sir, three cars with two fatalities, I-85 northbound, yes Sir, on the way. Despite the hurdles that lie in front of me – cold, fatigue, the loss of life – my job with the South Carolina Highway Patrol Multi-Disciplinary Accident Investigation Team (MAIT) is to investigate, document, and ultimately prosecute chargeable collisions. To properly reconstruct this collision, three essential and distinct categories must be investigated and documented in order to provide a well-founded explanation of the series of events prior to, during, and after the collision regarding the human, the vehicle, and the environment; this investigative technique is known as the 9-cell collision reconstruction matrix. (more…)

  6. Interpreting Industrial Incident Data – Lesson Learned

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    This is a case study about an incident I investigated involving a major upset in a distillation column.  This blog builds on the previous blogs about the Distributed Control System, DCS – Data is the Key.

    Distillation is a method of separating mixtures of compounds with differing boiling points.  Uncle Bill with his still on the hill separates ethanol, that boils at 173°F, from water that boils at 212°F.  If the mixture is heated to above 173°F, but below 212°F, the ethanol will boil, the vapor will travel up out of the unit and then can be condensed and served over ice with an olive…   Any mixture of two or more chemicals with different boiling points can be separated in this way.  The distillation (more…)

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