"present perfect" vs "past Perfect"

Hi there, should I use 'haven't occurred' or 'hadn't occurred' in the context?

  • Yesterday a tragic bus accident happened in Kolkata. At least 60 people died in the accident. The bus driver was found responsible for the accident. It is not that accidents like this hadn't occurred/haven't occurred before but the number of deaths had never risen/have never risen to that point before.

 

 In the above context which tense I should use?

I think if I use present perfect it mean before now but as the accident happened yesterday I think I should use past perfect.

 

I think in the last sentence "the number of deaths have/had never risen to that point before." I should use past perfect as it implies that before yesterday's accident the number of deaths had never risen to that point. 

If there is anything unnatural in my example, please forgive me. It was my own sentence. Please explain the right tense to use here.

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