NBC News producer Aliza Nadi highlights that Oscar Pistorius "sat there, almost frozen" when his ex-girlfriend Samantha Taylor took the stand on Friday:
"Samantha sounded fragile, broke down nearly every time asked about her break-up with Oscar. There was murmur in the courtroom when she dropped the bomb: He cheated on me with Reeva Steenkamp.
"During first mini-break after Taylor started crying, [Pistorius' sister] Aimee walked over to Oscar looking concerned. They whispered to each other. Her arm around his waist.
"Further into her testimony, Oscar started passing notes to his team. When she said he used his cell four to five times in bed nightly, he quickly wrote a note to his team. Oscar didn't show emotion throughout. He was clenching his jaw at times.
"When she stepped down, he went for a tight huddle with three to four members of his team. Looking strategic."