2 Police Seen

I was driving on a snowy day, it was night time I was driving at 30 mph I drove a little slower then I completely stopped to see something white run from one side of the road to the other side of the road I ended up taking a u-turn to go back home I was recently heading to the police station but it was storming so I headed back home I kept thinking about what I just saw happen right before my eyes a weird white creature running but why though.