Verses with the word murderer in the New Testament (5 verses):

John 8:44
Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.

Acts 3:14
But ye denied the Holy One and the Just, and desired a murderer to be granted unto you;

Acts 28:4
And when the barbarians saw the venomous beast hang on his hand, they said among themselves, No doubt this man is a murderer, whom, though he hath escaped the sea, yet vengeance suffereth not to live.

1 Peter 4:15
But let none of you suffer as a murderer, or as a thief, or as an evildoer, or as a busybody in other men's matters.

1 John 3:15
Whosoever hateth his brother is a murderer: and ye know that no murderer hath eternal life abiding in him.