I disagree with that somewhat, ten commandments holds true, and we find many passages in the NT indicating which laws we must still abide by, although murder isn't listed here it is in the OT which we must abide by:
1 Corinthians 6:9-11
9 Do you not know that the unrighteous will not inherit the kingdom of God? Do not be deceived. Neither fornicators, nor idolaters, nor adulterers, nor homosexuals, nor sodomites, 10 nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners will inherit the kingdom of God. 11 And such were some of you. But you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus and by the Spirit of our God.
Not only do those sinners not get into the Kingdom of heaven, but without doing the following works, Jesus himself says we'll be cast into the lake of fire. I know red letter Christians that prefer Jesus over other teachings, and I would have to agree as the Bible explicitly claims we should listen to Jesus over apostles:
Matthew 25:44-46
44 “Then they also will answer Him, saying, ‘Lord, when did we see You hungry or thirsty or a stranger or naked or sick or in prison, and did not minister to You?’ 45 Then He will answer them, saying, ‘Assuredly, I say to you,
linasmuch as you did not do
it to one of the least of these, you did not do
it to Me.’ 46 And these will go away into everlasting punishment, but the righteous into eternal life.”