Los Angeles ( CNN ) -- Justin Bieber 's focusing on making new music in the hip-hop capital of Atlanta , while lawyers in three other cities prepare to defend him in court . Bieber , who graduates from being a teen pop star when he celebrates his 20th birthday Saturday , has several court dates on his calendar next month . Miami DUI case . There are good reasons that Bieber 's lawyers could reject a plea deal and demand a jury trial for the drunken driving charge in Miami , according to a Florida lawyer familiar with the case . Lawyers sometimes beat the charge in court . A lawyer can defend a DUI charge by focusing on the technical aspects of the arrest and testing , questioning whether police did everything right , attorney Michael Salnick told CNN . If problems or deficiencies are found in what law enforcement did , those issues could be challenged . Was there probable cause for police to stop the singer 's Lamborghini ? GPS tracking data suggests the sports car was not speeding in the minutes before the arrest . If the judge lets a jury hear that , it might create reasonable doubt about the police officer 's claim he stopped Bieber and friend Khalil Sharieff after seeing them drag racing on a residential street . Was there probable cause for the officer to test Bieber 's sobriety ? The arresting officer said he became suspicious because he smelled alcohol on the singer 's breath , but lab tests later showed the alcohol level in his system was well below Florida 's legal limit for drivers under the drinking age of 21 . Bieber 's lawyer could argue that the officer made it up to justify the arrest . His defense might be bolstered if the judge allows the officer 's disciplinary record to be used to challenge his credibility . While the alcohol level was below the legal limit , a preliminary toxicology report on Bieber 's urine sample said he tested positive for `` metabolite of THC , '' which indicates marijuana use , and alprazolam , the generic name for the prescription sedative Xanax . `` Yeah , we were smoking all night at the studio , '' the singer told a police officer who told him he `` reeked of marijuana , '' according to police documents . No-risk trial in Florida . Defendants sometimes accept plea deals because they fear a judge would impose a tougher sentence if they were convicted in a trial . That 's not a risk with Florida 's DUI law , Salnick said . A judge would not give a sentence any different than what a prosecutor might offer in a plea deal , but a plea deal might allow the DUI charge to be kept off the defendant 's criminal record , replaced by reckless driving , he said . Probation rules -- including a drug-testing requirement -- would be the same . So , why go to trial ? An acquittal would be Bieber 's only way to avoid probation and drug testing , short of persuading the Miami prosecutor to drop the case , Salnick said . The prosecutor in Miami has not discussed a plea agreement with Bieber 's lawyer , Ed Griffith , a spokesman for the Miami-Dade state attorney 's office told CNN Tuesday . `` It 's way too early to offer a plea deal , if one was to be offered . '' Bieber could choose the DUI diversion program that is available to all first-time offenders , Griffith said . It would last between six and nine months with random drug testing , about $ 1,000 in fines and fees , 40 hours of community service , an alcohol education class . In addition , Bieber would have to attend a session in which victims of DUI wrecks tell their stories . `` There are 11 stories presented by real victims and sometimes defendants who relay their experiences , '' a description of the three-hour session said . `` There is a quiz at the end , and the defendant has to score 100 percent prior to completion . '' Deal or no deal , first-time offenders rarely go to jail if convicted of drunken driving in Florida , Salnick said . Bieber is likely not facing jail , unless he violates probation -- such as by failing a drug test . A trial had been scheduled to start next Tuesday , but instead a `` sounding '' hearing will be held with lawyers talking to the judge about preparations for a trial . Toronto assault charge . Bieber 's best resolution of an assault charge in Toronto may be a plea deal that includes a `` diversion '' plan , according to a Canadian lawyer interviewed by CNN . `` If he goes to trial , he probably would be convicted , '' said attorney James Morton , a past president of the Ontario Bar Association . `` The Canadian system 's conviction rate is extraordinarily high . '' Just 3.5 % of all defendants who plead not guilty and go to trial are acquitted , he said . Bieber allegedly struck his limousine driver on the back of his head several times while driving to a Toronto nightclub in December . Toronto prosecutors are likely already talking to Bieber 's lawyer about a plea deal with a `` conditional discharge , '' in which the case would not be prosecuted if he takes part in anger management and community service , Morton said . It 's the likely result for a young person without a criminal record who is not a celebrity , he said . Prosecutors will be under `` intense scrutiny '' and will want to avoid a deal that `` looks like they 're favoring a famous Canadian star , '' he said . The first court hearing is set for March 10 , but Bieber does not have to be there . A magistrate will hold several hearings over the next few months to make sure the prosecution has handed over all of its evidence , including statements and any video , to the defense before the case is assigned to a judge for trial , Morton said . California egg probe . Bieber faces a possible vandalism charge in connection with eggs tossed at his neighbor 's home last month , which caused an estimated $ 20,000 damage to a Calabasas , California , mansion . The egging case is what lawyers call a `` wobbler . '' The Los Angeles County district attorney 's office could prosecute it as a misdemeanor or a felony under California law . It is up to the prosecutor to decide how serious the case is , based on a defendant 's criminal history and other circumstances . A prosecutor has had the results of the sheriff 's investigation for almost three weeks , and a decision could come soon . A felony vandalism conviction could bring up to three years in prison and a $ 50,000 fine . The maximum penalty for a misdemeanor conviction is a year in the county jail and a $ 50,000 fine . A felony conviction could also limit Bieber 's ability to work in the United States , because he is a Canadian citizen with a work visa . Investigators searched his $ 6.5 million home last month , seizing the security video . Detectives gave the district attorney video clips identified from the night of the egg attack to use in the prosecution of Bieber . Another video recorded by the neighbor was also provided to investigators . Flying high ? The Federal Aviation Administration is looking into allegations that Bieber and other passengers onboard a charter flight from Canada to New Jersey 's Teterboro Airport on January 31 interfered with the flight crew , the agency said . Bieber and his father were `` extremely abusive verbally '' to the flight attendant on the Gulfstream IV aircraft as he traveled to attend the Super Bowl , according to a law enforcement sources . Both Biebers refused a pilot 's repeated warnings to stop smoking pot on the flight , according to a report by U.S. Customs and Border Protection , which was read to CNN . The FAA has not said when its investigation will conclude . CNN 's John Couwels contributed to this report .
Miami DUI 's Bieber case could be headed to a trial , lawyer says . No plea offer , but Bieber could choose a `` diversion '' program , Los Angeles prosecutor says . Taking the Los Angeles assault charge to trial is not Bieber 's best option , a lawyer says . Toronto prosecutor nears decision on whether egging case is a felony .