There are only small amounts of mature content throughout. There are a lot of threats of violence as this is a movie about con-artists (the antagonists, who are shady cops, resort to violent methods to earn their con money, however there methods generally don't turn out to work). The protagonist, Hooker, is chased a fair share of times by conmen with guns. Additionally these thugs also punch the protagonist and other characters in an attempt to gain money or information, but this is mild and only happened one or two times. A friend of the protagonist is murdered by the antagonists, but only the aftermath is shown and it is in the dark, so no bloody/disturbing details can be seen. Guns are fired, but only in one instance a character is killed, but it was out of self defense. You see the character shot in the head with a small amount of blood appearing on the character's forehead for a split second, but the camera turns quickly and the aftermath of her hit can't be seen. [(Spoiler) The last concern from violence comes from the final scene in the movie. Two men appear to have shot each other, but the ending reveals they staged their deaths in order to con a man. You'll see bits of fake blood on their shirt. (/Spoiler)]
Sexuality: One scene takes place in a brothel, but only one woman can be seen doing a performance. However the underwear she wears is thick so not much is exposed.
Language: There is a fair amount. It has a little too much for a PG movie, but I have heard much more language used in a majority of PG-13 movies. Sh-t is and 1 use of n----r (not directed to be racist) are the worst you'll hear. Small obscenties like hell or d-mn are also sprinkled throughout. Language was there, but it wasnt constant.