Tom Riddle - Riddle murders

[dawnflight1984]

No: HPFGUIDX 105472

Wanda Sherratt wrote:
> How old was Tom Riddle when the Riddles were murdered?  Did it 
happen
> before the basilisk incident in Cos, or after?  I'm not quite sure
> which came first, and if Tom was still a student when his father 
and
> grandparents were killed, or had just graduated.

I wonder if it really matters whether Tom was still a student or has 
already graduated. One thing was for sure, he wasn't an underaged 
wizard at that time, meaning he's probably at least 17 then and he 
murdered them before he was Voldemort. Right?