All 4 men are facing racketeering and firearms charges.
The New York rapper - real name Daniel Hernandez - was called before the magistrate along with five other members, believed to be, involved with the Nine Trey gang.
In his plea deal, Tekashi had to prove "that the crime he committed was the result of a serious mistake he made in his youth, one that was not indicative of the law abiding life he meant to lead as an adult".
At Monday's hearing, the judge ordered Hernandez be held until a November 20 bail hearing, saying he was concerned about the danger to the community, particularly because the rapper could direct others to carry out acts of violence.
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Actor Gerard Butler said on Instagram that his house in Malibu was "half-gone". The blaze destroyed almost 8,800 homes in the former gold mining settlement.
Lazzaro said his client had fired some of his co-defendants as part of his management and security team last week and was offered protection by federal agents on Saturday after some of them were overheard on wiretaps threatening his life. If found guilty, 6ix9ine faces a minimum of 32 years and a maximum of life in prison. "Showing reckless indifference to others' safety, members of the gang were allegedly involved in robberies and shootings, including a shooting inside the crowded Barclay's Center, and a shooting in which an innocent bystander was hit".
After the rapper refused protection, he was arrested on Sunday.
Tekashi just announced his debut album Dummy Boy yesterday, featuring tracks with Nicki Minaj, Kanye West, and Bobby Shmurda.
One prosecutor told a judge ex-members of Tekashi's crew "wanted to super violate him" following his appearance on the "Breakfast Club". where he accused his inner circle of turning on him. The indictment accuses gang members of murder, robbery, assault, the sale of drugs, and more. Sentencing in the case dragged on for years until, last month, a NY judge gave Hernandez four years of probation and required him to complete community service, refrain from gang affiliation, and avoid future arrests.