Trace Evidence (Glass)

Officer Shiffert was able to locate the bartender that night, a woman named Mia. According to Mia, she had been initially serving drinks to Viktor and Tyler, but started keeping her distance from them when their discussion started getting heated. About 10 minutes into her break, she heard glass breaking, but thought nothing of it, assuming some drunk slob had dropped their beer. A few seconds later, she heard screaming and then a massive shattering of glass. She went back into the main area of the bar to see people running about and the window of the bar almost entirely gone.

With Tyler becoming more and more of a suspect, Officer Shiffert has a decision to make. Arrest him now based upon the evidence she currently has, or dig a little deeper?