Three years later, in July 2011, Melvin departed WRC-TV for MSNBC to become a daytime anchor, while also contributing to NBC News as a reporter. In 2012, Melvin anchored MSNBC's coverage of the national conventions for the Republican and Democratic parties, as well as TV One's Election Night coverage, in partnership with NBC News. He also covered the Sandy Hook shootings in December 2012. In 2013, he covered the Moore tornado in May, as well as the crash of Asiana Airlines Flight 214 and the George Zimmerman trial in July. In 2014, Melvin covered the shooting of Michael Brown in August and the murder of Hannah Graham in September. In 2015, he covered the Charleston church shooting as well as the death of Freddie Gray in June. In 2016, Melvin covered the mass shooting of Dallas police officers in July and was also among the NBC reporters covering the Summer Olympics in Rio de Janeiro in August. That same year, he also succeeded José Díaz-Balart as anchor of "MSNBC Live".