We form the passive with the appropriate tense and form of the verb “be” and the past participle of the verb. We use the preposition “by” to introduce the person or thing which does the action.
We use the passive when:
1.) We are more interested in the action than the people who do the action
e.g.: The new hospital was opened yesterday.
2.) We do not know exactly who the agent is:
e.g.: My bag has been stolen!
3.) It is obvious or understood who did the action.
e.g.: The criminal was arrested at 5.30pm.
A murderer is when somebody kills another person.
Murder is the unlawful killing, with malice aforethought, of another human. Generally this premeditated state of mind distinguishes murder from other forms of unlawful homicide (such as manslaughter). http://en.wikipedia.org/wiki/Murder
The verb: to murder.
“To get away with murder”
To commit murder and not get punished [literal meaning]
To do something very bad and not get punished
The latest Hollywood blockbuster Sherlock Holmes revolves around occult murders and world conspiracies.
You can also visit The Sherlock Holmes Museum (221b Baker Street, London NW1 6XE), a privately run museum in London dedicated to the famous fictional detective Sherlock Holmes.