Last year Nelly's drug use was put on blast by a former friend with an ax to grind [click here if you missed that], turns out that guy knew what he was talking about.
Nelly was detained in Texas last night after drug sniffing dogs found weed and heroin on his tour bus...
Rapper Nelly was detained last night in Texas while police officers searched his tour bus -- and found HEROIN in addition to a loaded gun ... and MASSIVE amounts of weed ... law enforcement sources tell TMZ.
According to law enforcement sources, Nelly's bus was stopped at a border patrol checkpoint in Sierra Blanca -- and a police canine detected the presence of drugs.
We're told cops pulled the bus over -- and after performing a search, they found 36 small baggies of heroin (totaling .64 ounces) and over TEN POUNDS of marijuana inside a large green duffel bag (an amount roughly the size of a large bed pillow).
Cops also say they found a loaded .45 caliber pistol.
There were seven people riding on Nelly's bus at the time -- including the rapper -- and they were all detained during the search.
According to law enforcement sources, one of the passengers -- a guy named Brian Keith Jones -- admitted the drugs and the gun were his. He was subsequently placed under arrest.