A theory that describes chemical imbalances and physical brain changes in criminals

Described as "garlic-like" in smell and is a highly toxic chemical element. Used historically as a poison.

A small handheld device that immobilizes an individual through electrical shock.

"A clown can get away with murder."

Death caused by suffocation as a result of the lack of oxygen and increase of carbon dioxide in the blood. Also known as apnoea.

A personality disorder characterized by an exaggerated sense of self-importance, need for admiration, and lack of empathy.

The drug of choice in the '60's made you "trip" and used as a part of vision quests. Synthesized from the ergot fungus.

Folding knife and can be flicked back and forth resembling this insect which originates from the Philippines

The 1994 album, Divine Intervention by Slayer, features "213" a song about this famous serial killer who dissected and ate his victims.

A dark, ring-like mark found around an entrance wound, composed of lead, carbon oil and dirt.

“They don’t fear the consequences of their actions and are devoid of a conscience, empathy or regard for others. This is believed to be Biologically hardwired”

It was used as a nerve poison to kill, Kim Jong Nam, the eldest brother of former supreme leader Kim Jong Un of North Korea

It can fire a dart with a puff of air.

Talked about possessing his victims like an inanimate object and the need for total control.

A public official who investigates by inquest any death not due to natural causes

Social behaviours and values exist outside the realm of social norms.

Killing through radiation exposure, this poison was responsible for killing ex Russian spy - Alexander Litvinenko

A spring-loaded knife that switches open, quickly.

Dennis Rader was also known as the BTK Killer. What does the initials B - T - K stand for.

This type of firearm was featured in the film "Dirty Harry" with Clint Eastwood which had an automatically rotating cylinder with each pull of the trigger.

A theory that describes that criminal behaviours are modelled and emulated by an individual

It is an extract of the castor bean plant and in pure form is a deadly bio-toxin with no known antidote.

Described as a force multiplier, this was traditionally made of brass and fitted around the hand for striking.

Collected the bones from grave yards and made human skin lamps and even made a mask of a human face.

Discolouration and bruising that occurs after death.