I said the Law is dead to us, meaning we who are saved. It is alive still for all those unsaved and those who still follow the Old Cov. Scripture for this is from multiple places in Romans, it is a common theme for the book, 2 Corinthians 3:7-14, Colossians 2:14
And Ephesians 2:14-16
14 For Christ himself has brought peace to us. He united Jews and Gentiles into one people when, in his own body on the cross, he broke down the wall of hostility that separated us. 15 He did this by ending the system of law with its commandments and regulations. He made peace between Jews and Gentiles by creating in himself one new people from the two groups. 16 Together as one body, Christ reconciled both groups to God by means of his death on the cross, and our hostility toward each other was put to death.
Since the Law was replaced with Grace for those who accept Christ as their Savior, the Law has passed away(death). We died to the law, we are made alive by Grace and the Holy Spirit shows us right and wrong. The law condemns and we are not condemned anymore. So the Law has no hold on us anymore, hence it is dead.