Milwaukee police use national database to investigate crimes like the Midtown shooting

A quiet night near Midtown Center was interrupted by a seemingly never-ending burst of gunfire earlier this year. From the incident, Milwaukee Police collected a literal pile of evidence, 314 bullet casings. The I-Team learned from those 314 casings, police were able to determine 51 different guns were used. They were also able to tie 17 of those casings to other shootings across the city.