Gangsta-rapper C-Bo -- who recently emerged victorious in a battle over whether his album Til' My Casket Drops violated controversial conditions of his parole -- has been sentenced to an additional three months in jail for failing a drug test.

On Tuesday, the California Board of Prisons announced that C-Bo, a.k.a. Shawn Thomas, had tested positive for marijuana use in a drug test following his March 3 arrest for several parole violations. The prisons board offered him a sentence of 90 days, which he accepted.

C-Bo's attorney, John Duree, said Wednesday that the sentence was "on the high side, to say the least."

Duree noted that neither he nor his partner Jeff Rosenbloom had advised the 28-year-old rapper concerning the violation because parole authorities are not required to include attorneys in the sentencing process.

"Without advising us -- C-Bo's lawyers -- they went to him and told him that he had a dirty test and advised him that he should agree to accept an additional 90 days," Duree said. "I don't know if he had counsel whether counsel would have advised him to accept [the three-month sentence] or not. I will say 90 days for a single dirty marijuana test seems on the high side, to say the least. It would not be uncommon for, on a first dirty testing, to simply require more testing during parole."

Representatives from the California Dept. of Corrections did not return phone calls from SonicNet Music News.

Earlier this month, C-Bo was arrested on the grounds that lyrics on the recently released Til' My Casket Drops violated an unusual parole condition that forbade him from promoting a gang lifestyle, criminal behavior and/or violence against law enforcement. Included on the album is the song "Deadly Game," which protests California's three-strikes law and features the lines, "When they try to pull you over/ Shoot 'em in the face y'all."

That violation -- believed to be the first time that an artist was arrested because of song lyrics -- was dropped, but C-Bo remained jailed for one month on additional violations, including traveling beyond a 50-mile area without notifying his parole officer.

"This is a very harsh punishment for a minor infraction that didn't require incarceration," said C-Bo publicist Phyllis Pollack. "Bo doesn't know the legal system. He didn't know he could have gotten more frequent tests added to parole conditions."

C-Bo was originally convicted in 1994 for negligent discharge of a firearm during a fatal gang-related shooting. The rapper served 15 months in California's Soledad Prison and was paroled last July.

His new projected release date is May 17, 1998.