A serious truck crash can leave you searching for a clear explanation of what went wrong. If nobody tested the truck driver for drugs or alcohol, you may worry that investigators lost an important source of evidence. That uncertainty can feel especially frustrating when injuries have already disrupted your work and family life. Federal rules do not require testing after every crash, but carriers have specific responsibilities when certain conditions apply.
Know when testing is required after a truck crash
Federal rules do not demand a test after every crash. Under Federal Motor Carrier Safety Administration (FMCSA) rules, a trucking company must test its driver for alcohol and drugs any time the crash killed someone, whether or not police issued a citation.
Otherwise, the rules require a test only if the driver got a citation for a moving violation and someone left the scene for immediate medical care, or a tow truck had to haul a vehicle away. A severe crash with no citation may produce no test at all.
Check whether the trucking company followed the rules
Timing tells you almost as much as a result would have. A company that cannot get an alcohol test within two hours must document the reason for the delay. After eight hours, it has to stop trying and keep that same record. The drug testing window closes at 32 hours. The carrier generally must keep those explanations, along with its internal testing decision records, for five years. A vague or missing reason can raise questions about how carefully the carrier handled its responsibilities after the collision.
Find other signs that the driver may have been impaired
Impairment leaves traces outside a lab report. Officer observations in the crash report, body camera footage, dispatch audio and remarks the driver made at the scene all describe how he or she seemed. Receipts, fuel stops and cellphone records help rebuild the hours before impact. Electronic logs may show a driver pushing past legal limits, which raises fatigue as a separate issue.
Save records that show what happened after the crash
Evidence disappears fast, and much of it sits on someone else’s server. Because a carrier’s post-crash testing duties attach to records it controls, a written preservation request sent early can interrupt routine deletion of driver logs, dispatch notes and bills of lading. Keep your own file too, including medical records, photos, the crash report and every letter an insurer sends you.
See how missing test results can affect your claim
You can still build a case without a lab result. Georgia law may let a jury draw an unfavorable conclusion when a party destroys or hides evidence it had a duty to preserve, though courts apply that rule narrowly and the facts matter. Many trucking claims never turn on impairment anyway. Speed, following distance, hours of service violations and negligent hiring each stand on their own proof.
Decide what evidence to focus on next
A skipped test closes one door, not the hallway. Start with what still exists, including the citation, the towing record, the officer’s narrative and the carrier’s written explanation for why no test happened. Ask for those in writing while retention clocks are still running. What survived usually tells you more about your claim than the single test that never took place.