The Border (1982)

Charlie Smith (Jack Nicholson) barely scrapes by on his low salary, but his hectoring wife, Marcy (Valerie Perrine), is anxious to move up in the world, so he takes a new position as a border patrol agent alongside the hair-trigger Cat (Harvey Keitel). Soon, Charlie is a reluctant party to Cat's smuggling and other petty criminal actions, but when the corrupt agent sets his avaricious sights on a poor illegal immigrant (Elpidia Carrillo) and her newborn baby, Charlie's moral code returns.