I think this should count as murder (attempted murder if the victim does not fall prey that is), since there is an intention to kill and the process is plotted and carried out ruthless with extraordinary care and profound understanding of human psychology on the killer's part. But legal definition of murder often refers to UNWILLINGNESS on the victim's part. So I'm very confused.
I have two other questions: is there truly a legal path to prosecute the killer and has any of such killer actually been caught and punished? If so, what type of evidence would be needed in the court to make such act prosecutable?
I'm more interested in US law but cases in other countries are welcome as well