Answer: Sepultura... The band was founded by teen brothers Max and Igor Cavalera...
... After several early membership changes, Sepultura established a stable lineup of Max on guitar, Igor on drums, vocalist Wagner Lamounier, and bassist Paulo Jr.[22] Lamounier departed in March 1985 after disagreements with the band, and moved on to become the leader of the pioneering Brazilian black metal band Sarcófago. After his departure, Max took over the vocal duties. Jairo Guedes was invited to join the band as lead guitarist.[23]...
Departure of Max Cavalera (1996–1997)In 1996, Sepultura played on the Castle Donington Monsters of Rock main stage alongside Ozzy Osbourne, Paradise Lost, Type O Negative, Biohazard and Fear Factory. The band was suddenly a three-piece with Andreas Kisser taking over on lead vocals, after Max Cavalera left the concert site earlier in the day upon learning of the murder of his stepson Dana Wells. Meanwhile, just after the release of Roots the band decided to fire their manager Gloria Bujnowski, who was Max's wife and Dana's mother. These events resulted in Max's departure from the band. For many years, the true reasons behind his departure remained unknown.[34] Max ultimately left the band after a performance at Brixton Academy in England on December 16, 1996, and later formed a new band, Soulfly. The remaining members of Sepultura announced that they would continue with a new lead vocalist. In 1996, Sepultura performed "War (Guerra)" for the AIDS benefit album Silencio=Muerte: Red Hot + Latin produced by the Red Hot Organization.
In an interview with Faceculture in 2010, Max Cavelera claimed that he left Sepultura because Andreas Kisser's wife attempted to arrange Dana Wells's funeral before Max and his wife Gloria Bujnowski could return home from England. The band later offered to allow Kisser and Paolo Jr. to be managed by someone else, while Max and Igor would retain Bujnowski as their manager, but Max rejected the plan. Max claimed in the interview that he regrets these events but a reunion is unlikely due to lingering disputes between him and Kisser.[35]
http://en.wikipedia.org/wiki/Sepultura