Same thing happened to me last year in NYC. Although my shiner healed within a few weeks, the PTSD took quite a bit longer to diminish and so did the anger at the NYPD for refusing to pursue it in spite of clear security camera footage (in fairness though, I think the NYPD precinct was merely acting on the ADA's direction and felt that their hands were tied). Hope your girlfriend makes a recovery from the trauma, physical and emotional. It's a terrible thing to be subjected to.