Ah, wrong again. It was a knife.

又错了的确是刀
But "stabbed" implies the blade was thrust into the victim,

但说"捅"就是说刀是被强行插入死者身体的
whereas this wound was produced by it being hurled into her chest.

而这个伤口是由刀被扔进胸膛所致
What is this, "Last of the Mohicans"?

这算什么《最后一个莫希干人》吗
What kind of knife is it?

是什么样的刀
Uh, one with a hilt that matches these small bruises

刀柄应该能与伤口两侧的
on either side of the wound.

瘀痕吻合
It killed her instantly,

一击即刻致命
severing the left anterior descending artery.

切断了左前降动脉
Okay, so, either that's the luckiest knife toss in the world --

如果这不是世上最幸运的一掷
Or she was killed by a circus knife thrower.

就是凶手是马戏团的投刀手
Like the great throwdini.

就像伟大的小李飞刀