Collision Reconstruction Technical Resources
Professional educational resources on collision reconstruction, vehicle electronic data, evidence preservation and heavy-vehicle inspections — written for attorneys, insurers and litigation professionals. These resources explain technical concepts; they do not provide legal advice or guarantee any outcome.
Collision Reconstruction Glossary & Terminology
A professional glossary of collision reconstruction terms — EDR, ACM, CDR, ECM, ABS, speed analysis, crush analysis, time-and-distance analysis and crash-scene investigation terminology.
View GlossaryWhat Is Collision Reconstruction?
A professional explanation of collision reconstruction — what it is, what evidence it uses, and how it supports civil and criminal litigation. Written for attorneys and litigation professionals.
Read ArticleUnderstanding EDR and Crash Data Retrieval
What an Event Data Recorder (EDR) is, what crash data retrieval (CDR) involves, and how vehicle "black box" data may support collision reconstruction. Written for attorneys and litigation professionals.
Read ArticlePreserving Vehicle and Electronic Evidence After a Collision
Why early preservation of vehicle and electronic evidence matters after a collision, and what counsel can do to help ensure relevant data and physical evidence remain available for reconstruction.
Read ArticleHeavy-Vehicle Electronic Data: What Counsel Should Know
What electronic data may be available from a commercial vehicle, the roles of ECM and ABS systems, and how heavy-vehicle inspections differ from passenger-vehicle EDR retrieval.
Read ArticleWhen Should Counsel Consider Retaining a Collision Reconstruction Expert?
When a collision reconstruction expert should be retained, why early involvement matters, and what information helps a reconstructionist begin a meaningful analysis.
Read ArticleWhat Is an Airbag Control Module (ACM)?
A professional explanation of the Airbag Control Module (ACM), how it relates to an Event Data Recorder (EDR), and what crash data may be available from supported vehicles. Written for attorneys and litigation professionals.
Read ArticleHeavy-Vehicle ECM Explained
What an Engine Control Module (ECM) is in a commercial truck, what electronic data it may record, and how ECM data differs from passenger-vehicle EDR data. Written for attorneys and litigation professionals.
Read ArticlePreserving Crash Scene Evidence
Why early documentation of crash scene evidence matters, what physical and roadway evidence may be relevant, and how scene preservation supports later collision reconstruction. Written for attorneys and litigation professionals.
Read ArticleEvidence a Reconstruction Expert May Review
The types of physical, vehicle, electronic and scene evidence a collision reconstruction expert may review, and how that evidence is evaluated as part of a reconstruction analysis. Written for attorneys and litigation professionals.
Read ArticlePreparing Materials for Collision Reconstruction Review
What information and materials help a collision reconstruction expert begin a meaningful analysis, and what counsel can gather before contacting a reconstructionist. Written for attorneys and litigation professionals.
Read ArticleRelated Authority Pages
Contact M&M Security Services
For collision reconstruction assignments, vehicle-data questions, or expert-witness availability, contact our office directly.