Episode 45 of "Cold Case"
s02e22 Best Friends

Rush and Valens re-open the 1932 case when a truck containing human bones is pulled from the Delaware River. Rush and Valens link the truck to a former prohibition era bootlegger and learn that the bones may belong to his sister, Rose, who unexpectedly went missing with the truck. As the case takes shape, Rush discovers that Rose took up company with a black girl who dressed and behaved like a man, named Billie. When forensics confirms the bones are not Rose's, Valens tracks her down and learns of her controversial friendship with Billie, which alienated several people, including Billie's ex-lover, Georgie, who always believed they were more than friends.