Clearly, with the FPD having recovered "several spent casings," this who done it will be solved in no time!
http://www.fredericknewspost.com/locations/local/frederick_county/frederick/article_4b9b1380-cd10-11e2-8121-0019bb30f31a.html
http://www.fredericknewspost.com/locations/local/frederick_county/frederick/article_4b9b1380-cd10-11e2-8121-0019bb30f31a.html