The circus that swirled around Michael Jackson when he was alive rolled on Friday as the doctor expecting to be accused of involuntary manslaughter in his death planned to stage a surrender at a courthouse but called it off after prosecutors announced charges will be filed Monday. Instead of the promised appearance by Dr. Conrad Murray and his lawyers, a crowd of reporters and photographers gathered outside a branch courthouse only got a drenching from a rainstorm. Murray, working as Jackson's personal physician during the singer's preparation for comeback concerts, has been under investigation since the 50-year-old pop star died June 25 after being administered the hospital-strength anesthetic propofol and sedatives at his rented mansion to help him sleep. It's not clear what would have happened had the cardiologist shown up without a case being filed. District attorney's spokeswoman Sandi Gibbons said the events had no bearing on when the case would be filed. She released a terse statement saying prosecutors will be filing a case involving Jackson's death on Monday, but it did not name Murray or specify the charges. “The main thing is there's some paperwork that needs to be done. We're doing it and (the case) will be filed on Monday,” Gibbons said. The doctor's legal team has said Murray will be charged with involuntary manslaughter. “We'll make bail, we'll plead not guilty and we'll fight like hell,” said lead defense attorney Ed Chernoff. The strange chain of events, which at one point saw reporters scramble from the courthouse to nearby recreational grounds called Polliwog Park for a news conference that never happened, fueled intense speculation about what was going on behind the scenes. The developments occurred against a background of reports that police wanted to arrest and handcuff Murray, but that his attorneys were negotiating with the prosecution to avoid that.