She told the jury that Primrose’s parents relationship had been “frequently volatile” and Kitchen had been arrested and cautioned in September 2014, when Primrose was three weeks old, for slapping Kane while she was holding the infant.
Kyle Kitchen, 38, vigorously shook newborn Primrose Kane and either hit her with a hard object or threw her against a hard surface leaving her with life-changing injuries, the Old Bailey heard.
Opening the murder trial at London’s Old Bailey on Tuesday, Ms Knight told jurors: "Kyle Kitchen's convictions prove that he is guilty, not merely of causing grievous bodily harm with intent, but of murder.
Primrose’s mother Kenzey Kane, 31, was found guilty of causing or allowing serious injury to a child by failing to protect her daughter.
Primrose Kane was left unable to communicate verbally and had to be fed through a tube after the incident, which happened when she was just eight weeks old.
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