But body language specialist Cliff Lansley claims on the Investigation Discovery show that this was a 'useful tactic' employed by the defendant and his legal team to curry favour with the judge.
Lansley believes that when Pistorius 'realised he was going to be found guilty' he used the emotional display to 'gain sympathy'.
Pistorius was jailed for six years in 2016 for murdering Steenkamp.
This is followed by five days of often intense cross-examination, marked by bouts of tears and breaks in the session.
Pistorius steadfastly denies any intention to kill Steenkamp.
Starring Andreas Damm as the 30-year-old double-leg amputee and Toni Garrn as girlfriend Steenkamp, the promo shows the athlete holding a pistol and shouting 'get out of my house' before firing the weapon twice.
It stars Andreas Damm as the 30-year-old double-leg amputee and Toni Garrn (pictured) as girlfriend Steenkamp In one scene Pistorius he challenges Steenkamp to 'prove to me that this is what you want and that you are worthy of me and this relationship' before she strips to her underwear and climbs into bed with him In one scene, Pistorius tells his girlfriend she will be his 'personal angel' as he trains for the Olympics.