use expert testimony造句

A prosecutor used expert testimony to draw a portrait of O . J . Simpson as a killer in a dark sweat suit, suggesting fibers from his sleeve were entwined with his slain ex-wife's hair and scattered on evidence.
This means that if a defendant does not stipulate to the authenticity and accuracy of a trade inscription, and the plaintiff lacks testimony from percipient witnesses who can establish a complete chain of custody leading back to the defendant, then the plaintiff must use expert testimony to establish the authenticity of the inscription " and " to get around the obvious hearsay issue ( i . e ., to establish, based on common practice within the trade, that the product is what the inscription says it is ).
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