(CBS) -- Documents filed by the Los Angeles County District Attorney allege that singer Chris Brown may have falsified the community service hours he was supposed to perform after pleading guilty in June 2009 to assaulting then-girlfriend Rihanna.
According to the motion filed Tuesday by Los Angeles County Dist. Atty. Jackie Lacey, an investigation revealed "no credible, competent or verifiable evidence that Defendant Brown performed his community labor as represented to the Court."
In August 2009, a Los Angeles judge sentenced Brown to 180 days of community labor, and allowed Brown to perform that labor in Virginia, where, according to the Los Angeles Times, he has a home. But, according to the motion, "Brown could not have performed community labor as claimed because he was not physically present in the Commonwealth of Virginia on several of the reported dates."
Brown is scheduled to appear in court Wednesday to face Lacey's allegations. The motion asks that the judge find Brown in violation of his probation and rule that the singer must perform the remainder of his mandated service in California.
Crimesider left a message Tuesday with the office of Brown's attorney, Mark Geragos, seeking comment, but has not received a response. Geragos told the Associated Press, however, that the motion was "frivolous, scurrilous and frankly defamatory," and said he plans on seeking sanctions against the D.A.
"The motion filed by the DA's office is shameful and a disgrace," Geragos told the AP. "In essence, it calls everyone a liar in the Richmond Police Department and the Virginia Probation Department."
Both the Richmond PD and the Virginia Department of Corrections declined to comment on the allegations in the motion.
Lacey's motion lists myriad alleged discrepancies in the accounting of the dates and times Brown performed his community labor, as well as missing documentation of those dates. For example, the motion states that Brown was flying to Cancun, Mexico on March 15, 2012, when the Richmond Police Department reported he was picking up trash.
The document states that, according to an employee of the Richmond Police Department who was assigned to supervise some of Brown's labor, "Mr. Brown did not report to work according to any schedule, instead he showed up based on his personal availability."
In addition to the questions raised about whether Brown actually served his court-ordered community labor, the motion indicates Brown was involved in three "potential probation violations," including an altercation outside a California recording studio on Jan. 27, 2013; multiple instances of testing positive for marijuana and "failure to obtain a travel permit" in 2012; and throwing a chair through a window at the Good Morning America studios on March 22, 2011.