Love can build a bridge. Looking for individuals to help with construction. Contact your local We are ready centers to join.

How do you kill someone and make it look like a normal heart attack?
Adrenochrome.
What can make your body think it's under mass stress if to much is used?
Adrenochrome
What can make your body so stressed you sweat blood?
Adrenochrome
Why do these evil people look so damn pale with black eye circles?
Burst capillaries that haven't healed from sweating blood.
What causes that?
Adrenochrome
What is the cure?
A rope.

Only people mentioned by @BabyLoneWolf in this post can reply

Love can build a bridge. Looking for individuals to help with construction. Contact your local We are ready centers to join.

In response Wil Wagner to his Publication

Not sure but I wouldn't doubt it. If you were not a user just a small amount would cause cardiac arrest. And sense your body would also be releasing it during the arrest it would not be something that would be deemed unnormal during an autopsy.