Collocations for murderer - noun

accused (esp. BrE), alleged, suspected
convicted
potential, would-be
Does the death penalty deter would-be murderers?

double, mass, multiple, serial
real
He protested his innocence and promised to help police track down the real murderer.

brutal, cold-blooded, ruthless, vicious
insane, psychopathic
infamous, notorious
child
axe/ax
suicide

hunt, hunt down, hunt for, track down
catch, find, identify, reveal (sb as)
arrest
punish
sentence
execute, hang, kill

strike
The murderer has struck again.

kill sb

bring a murderer to justice
the identity of the murderer
The identity of her murderer has not yet been revealed.