Kristen Gilbert

Injecting them with lethal doses of insulin and potassium.

And then there's Kristen Gilbert in the United States, a nurse at a Veterans Affairs hospital who induced cardiac arrest in multiple patients by secretly injecting massive doses of epinephrine into their intravenous fluids.

But the motive in these clinical settings seems slightly different than the mother seeking sympathy.

Like, it's not quite the same flavor of attention.

Sackman would spend years hunting people like Michael.

and later helped bring down a VA nurse named Kristen Gilbert, who murdered her own patients in Massachusetts.

Because the frightening thing about this case is that being a monster wasn't enough to stop Michael Swango.

He needed dozens of other people to look away.