Former Los Angeles County Sheriff Lee Baca is one step closer to prison after the U.S. Supreme Court refused this week to hear an appeal of his conviction on federal charges of obstruction of justice and lying to the FBI.

The 77-year-old former sheriff, who has Alzheimer’s disease, was sentenced in May 2017 to three years in federal prison, but has remained free pending appeal. The denial sets the stage for a Los Angeles federal judge to schedule a surrender date.

“The Supreme Court missed an opportunity to right the significant legal wrong that occurred in Sheriff Baca’s case,’’ Nathan Hochman, an attorney for Baca, told City News Service.

The case will return to the U.S. 9th Circuit Court of Appeals in Pasadena, which first rejected Baca’s appeal. The circuit court will then hand the case back to U.S. District Judge Percy Anderson, who is expected to schedule a date for Baca to turn himself in to begin his sentence.

The Supreme Court’s denial was expected since the high court only agrees to hear a small percentage of the appeals it receives.

The ex-sheriff was convicted of charges of conspiracy to obstruct justice, obstruction of justice and making false statements. During his two trials, prosecutors described the ex-lawman as being the top figure in a multi-part conspiracy, which also involved his former right-hand man, former Undersheriff Paul Tanaka, and eight deputies who took orders from the sheriff.

Baca—who ran the nation’s largest sheriff’s department for more than 15 years—was first tried in December 2016 on obstruction of justice and conspiracy to obstruct justice counts, and prosecutors had planned a second trial on the false statements count.

But a mistrial was declared after jurors deadlocked 11-1 in favor of acquittal, and the judge in downtown Los Angeles combined all three counts in the retrial that ended with Baca’s conviction. Baca did not take the stand in either trial.

The charges stemmed from events nine years ago when a cell phone was discovered in the hands of an inmate/informant at the Men’s Central Jail. Sheriff’s deputies quickly tied the phone to the FBI, which was conducting a secret probe of brutality against inmates.

At that point, sheriff’s officials closed ranks and began an attempt to halt the formerly covert investigation by concealing the inmate-turned-informant from federal prosecutors, who had issued a summons for his grand jury appearance, prosecutors said.

Baca was elected sheriff in 1998 and re-elected three times. He was poised to run again in 2014, but federal indictments unsealed in December 2013, related to excessive force in the jails and obstruction of that investigation, led him to retire the following month.

In addition to the 10 people convicted in connection with the Baca conspiracy case, 11 other now-former sheriff’s department members also were convicted of various crimes uncovered during