Amberlyn White

Amberlyn White was the victim in Sing Your Heart Out (Case #1 of Shernola).

Murder details
As the Player and Scarlet sat down to watch Amberlyn sing, she started to perform. Mid-performance, she sung a high note and her heart shot out of her body. The peacemaker wouldn't have done this without a certain dose of adrenaline, meaning that the killer uses adrenaline.

Killer and motive
The killer turned out to be the victim's fiance, Patrick Hull.

Her motives for unknown of why she didn't want to marry Patrick, and tried to break off from Patrick. Patrick, enraged, armed her peacemaker with a high dose of adrenaline, causing the heart to fly out of her body.