Reeva's uncle, Michael Steenkamp, broke down in tears when describing to reporters what a close-knit family she belonged to and how all of her relatives had been due to celebrate Christmas together.
He said that Reeva had spoken about her desire to become an activist fighting abuse against women in the months before her death.
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Theresa May has welcomed passage of her flagship EU Withdrawal Bill through Parliament.
It comes after a report found more than 450 patients had their lives shortened after being prescribed powerful painkillers.
“We’re going to keep families together and the border is going to be just as tough as it’s been,” the president told the crowd.