Buffalo Bills linebacker Von Miller turned himself into police custody after Dallas authorities issued an arrest warrant for suspicion of domestic violence, TMZ reported. Miller is accused of assaulting his pregnant girlfriend during an argument, police sources told WFAA. The Bills in a statement said they were probing the incident but did not share any further information. “This morning, we were made aware of an incident involving Von Miller. We are in the process of gathering more information and will have no further comment at this point.”