BAKERSFIELD — Charges have been officially filed against the wife of a slain BNSF Railway worker from Helendale.

Sabrina Limon, 37, was charged Tuesday with six felony counts, including murder, attempted murder and poisoning, according to Kern County Superior Court records.

Multiple media outlets reported that Limon pleaded not guilty during her arraignment, which came one day after Jonathan Hearn — a former firefighter from Hesperia — pleaded guilty to voluntary manslaughter and other lesser charges in the killing of Limon’s husband, Robert.

Robert Limon, 38, of Helendale, was shot to death following a work shift at a BNSF industrial complex in Tehachapi in August 2014.

Pursuant to his plea bargain, Hearn — who attorneys say was having an affair with Sabrina Limon — will testify against her at trial. Hearn’s guilty plea will come with a sentence of up to 25 years, four months once Sabrina Limon’s trial is over. He will be eligible for parole.

Defense attorney Clayton Campbell previously said he expects Hearn's testimony will provide crucial evidence to the prosecution's case against Sabrina Limon.

Sabrina Limon was arrested in Camarillo last Friday, days before Hearn’s trial was scheduled to start. She was previously arrested in November 2014 but released shortly thereafter due to insufficient evidence.

On Tuesday, she also pleaded not guilty to conspiring to commit a crime, solicitation to commit murder and accessory.

Sabrina Limon is due back in court Jan. 20 for a pre-preliminary hearing, court records show.

Matthew Cabe can be reached at MCabe@VVDailyPress.com or at 760-951-6254. Follow him on Twitter @DP_MatthewCabe.