Lindsay Lohan arrives at court in Los Angeles California on June 23 2011. Troubled US starlet Lindsay Lohan was back in court Thursday for breaching probation after failing an alcohol test while already on home detention, officials and reports said. DA office spokeswoman Sandi Gibbons said she did not know the exact nature of the alleged violation, but the TMZ celebrity news website said it was because Lohan tested positive for alcohol in the past week. AFP PHOTO / Robyn BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)