In a chilling case of jealousy-fueled violence, a Connecticut man has been sentenced to three decades behind bars for brutally stabbing his girlfriend to death. The tragic incident unfolded when Pedro Grajales, 55, from Hartford, acted on his unfounded suspicions of infidelity, ultimately taking the life of Nilda Rivera, 57, by stabbing her more than 25 times inside his vehicle.

Grajales faced the courtroom last Wednesday, where he received a 30-year prison sentence after pleading guilty to the charge of murder. Court documents, accessed by Law&Crime, reveal the grim details of the crime that shocked the community earlier this year.

According to an arrest warrant reported by local news outlets like WTIC and CT Insider, Grajales orchestrated the tragic event in April 2023. Before the murder, he shared a final meal with Rivera at a McDonald’s, a seemingly normal outing that belied his sinister intentions.

In a calculated move, Grajales later drove Rivera to a parking lot under the guise of needing to pick up lumber. There, he unleashed his fatal attack. After committing the crime, Grajales took Rivera’s lifeless body to a nearby police station, where he confessed to officers, admitting that he had been planning the murder for several days due to his baseless belief that she had been unfaithful.

The arrest warrant described Grajales’s behavior as disturbingly deceptive. In the days leading up to the murder, he deliberately treated Rivera with kindness to avoid raising her suspicions. He concealed a knife in his pocket as they headed to the McDonald’s drive-thru on Brainard Road, maintaining a veneer of normalcy until the moment he chose to end her life.

This tragic case serves as a stark reminder of the destructive power of jealousy and the dire consequences that can ensue when irrational fears spiral out of control.

“[Grajales] moved his seat all the way back so he could have enough room to swing the knife,” his arrest warrant said. “Grajales removed the knife from his left pocket and began stabbing [Rivera] multiple times as she sat in the front passenger seat.”

Grajales told police that he “watched” as Rivera “gasped for air” and “waited for her to die” before driving her lifeless body to the Hartford Police Department to report what happened, according to the warrant.

Rivera’s family told WTIC after the slaying that Grajales was “very jealous” and “would look in her phone and delete stuff and go on her social media and delete people,” the station reported in April 2023.

“My mom was just looking for love,” said Daniella Valle, Rivera’s daughter. “She was a mother. She was a grandmother. She was a friend.”