Advantages of an ice pick:
(1) it is inexpensive
(2) it is legal to carry
(3) it is easily concealed
(4) it is terrifying
(5) it can leave a relatively small wound
(6) it can be used to torture the victim
Often a victim will have numerous stab wounds, especially if the attacker becomes frenzied.
An ice pick stab can be fatal if:
(1) it enters the brain through a temple
(2) it enters the brainstem at the back of the skull base
(3) it punctures the heart
(4) it makes a tear in a major artery
(5) it causes a pneumothorax
(6) it causes peritonitis
(7) it tears the liver and/or spleen
(8) there are enough of them (massive injury)