Girls, ok I'm writing a cozy mystery and need to decide on the death scene of the main dead character?

The character who gets killed is 16yo high school hotshot Kevin, who's been flinging with multiple girls and one of them finally takes him out. So how should this boy's character die?
Kevin is found dead with a classic knife in the back, whodunnit
Kevin is found dead shot in the gut or head
Kevin is found dead with an axe in his back
Other (write comment)
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Girls, ok I'm writing a cozy mystery and need to decide on the death scene of the main dead character?
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