Frozen River (2008)

Takes place in the days before Christmas near a little-known border crossing on the Mohawk reservation between New York State and Quebec. Here, the lure of fast money from smuggling presents a daily challenge to single moms who would otherwise be earning minimum wage. Two women - one white, one Mohawk, both single mothers faced with desperate circumstances - are drawn into the world of border smuggling across the frozen water of the St. Lawrence River. Ray and Lila - and a New York State Trooper as opponent in an evolving cat-and-mouse game.

See: Frozen River at Wikipedia