Cutthroat Cupcakes

Killer cupcakes.
Seems improbable to Lina, but when an attractive detective snaps cuffs on her and accuses her of witchy crimes she’s forced to reconsider.
The murder weapon? A cupcake topper sold in Lina’s shop, Sticky, Tricky Treats.
The method? A killing curse. 
The curse’s origin? Lina...sort of. 
Except Lina hadn’t a clue that she was a witch, and certainly didn’t know she’d accidentally cursed some of her confections. 
She’s got to catch the killer who used her magic to murder or possibly face a conviction as an accessory.
Now, if only the wizard detective assigned to the case weren't such a distraction.