William Blair analyst Matthew Pfau believes today's post-earnings selloff in shares of ShotSpotter provides a good entry point. The analyst admits, however, that ShotSpotter shares will likely be in the penalty box for several quarters as management regains investor confidence. With that said, Pfau does not think the recent customer loss highlighted by management is indicative of a broader trend. Further, ShotSpotter is selling to cities and municipalities, and the red tape in getting deals approved can be substantial and create the potential for delays, adds the analyst. Pfau keeps an Outperform rating on ShotSpotter shares.