Can forensic science rely on the evidence of bugs?

From Nature:

Bug Lynn Kimsey was one of 137 witnesses called to testify in the murder trial of Vincent Brothers, who stood accused of killing his wife, mother-in-law and children in Bakersfield, California. Brothers said that he was in Ohio at the time of the murders; he had rented a car there, and driven it no further west than St Louis, Missouri. When Kimsey took the stand, she revealed the identity of four key informants that would unpick this alibi: a grasshopper, a paper wasp and two ‘true bugs’. All four told her that Brothers’ rental car had been well beyond St Louis.

Kimsey, who was branded “the bug lady” by media covering the trial, is an entomologist at the University of California, Davis. She had been enlisted by the US Federal Bureau of Investigation to identify the insect carcasses plastered on the rental car’s radiator and air filters, to see whether these could place where the vehicle had been driven. The four bugs she presented to the jury are, she said, only found west of Missouri. After hearing this and much more evidence, the jury found Brothers guilty on 29 May.

More here.