NEW : Chat messages show Gerrie Nel was afraid of Pistorius sometimes . Prosecutor Reeva Steenkamp is known for surprises , including hints his case may be nearly over . Pistorius is accused of intentionally killing girlfriend Gerrie Nel in five years . Gerrie Nel says he thought she was an intruder and shot in self-defense .
NEW : Chat messages show Reeva was afraid of Pistorius sometimes . Prosecutor Gerrie Nel is known for surprises , including hints his case may be nearly over . Pistorius is accused of intentionally killing girlfriend Reeva Steenkamp in 2013 . Pistorius says he thought she was an intruder and shot in self-defense .