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Trace
By using important equpment
Not sure of the wording of your question, but most explosions leave a LOT of trace evidence.
Diamond colour comes from inclusions in the stone of a trace mineral, or by alterations in electrons experienced by the stone as it erupted from deep within the earth's mantle to the surface.
The trace elements in concrete are,CementFine aggregateCoarse aggregateWaterAdmixtures.
unknow right now....
Trace
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trace
Trace evidence in criminal investigations was shown by Dr. Edmond Locard in the early 20th Century.
Trace
Evidence of an organism's activities is recorded in trace fossils. These include tracks, fossilized dung, and burrow casts.
This could be trace evidence
There is no fat in sugar (though trace amounts may be present as a result of different processing methods).
The cast of Trace Evidence - 2011 includes: Todd James Jackson as Detective Witt Rob Ullett
Sometimes the prepatrator leaves evidence behind that can trace them to the cause. Basically, if there's enough evidence the man or woman left behind, they can be connected to the crime and caught faster.
Trace fossil