When she dies all that's known is that there was an explosion in her ship that kills her gunner. It seems a little suspisious, considering the bombs that have been used earlier. I think Jazz mentions killing her later on though [not sure,it's been a long time since I've played wc2].
Yes, Jazz sabotaged Spirit's fighter -- he admits this later in the game. He was also the one e-mailing her to tell her that Philip was on the space station.
The E-Mail that he send was to blackmail Spirit in order for her to work for the mandarins.
Note that Jazz never tell in those E-mails that he was the Mandarin spy.
Spirit fience was held hostage in that base, Jazz try to Blackmail Spirit for her to work for the Mandarins/Kilrathi, she refused and he kill her.
Also Jazz wanted to kill all the poeple that were on the Tiger´s Claw during that "sivar dreadnought" missions, since his brother was kill on the colonie that that ship destroyed.
The reason was revenge.
Ok thanx Dragon! I got you the first time, but now it's a lot clearer...
I was only asking about Spirit, but now that you said it, I vaguely remember from my "I don't know English" time that Jazz mentioned his brother and the Goddard colony...