Shrien Dewani has found a way to beat the system. Exercise. Exercise that keeps his CK level's high. High CK levels, no medication for depression. High CK levels impossible to evaluate for extradition. Shrien Dewani is not depressed he has no time for depression he is too busy keeping himself from returning to South Africa and his murder trial.
Add to that the rotten corrupt British judicial system (see link below) and it is very hard to see how the Hindocha family will ever find peace.