When Sarah is handcuffed and taken by Art and his partner, Sarah correctly says they have nothing to arrest her for, then the detectives' actions can be seen as kidnapping and false imprisonment as they have no legal grounds.
Ramone tells Allison his guns are "all clean, numbers filed," yet when he shows her the .45 the serial number is clearly visible.
In later scenes the cut on Sarah's lower lip seems to have disappeared without any concealing make up.