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A Michigan man has been charged with aggravated murder after he and another person allegedly posed as utility workers According to local authorities, they killed workers before killing a man and tying up his wife.

Carlos Jose Hernandez, 37, A Dearborn, Michigan, resident has been charged with aggravated murder and two counts of unlawful imprisonment, according to a news release from the Oakland County Prosecutor’s Office on Sunday.

Hernandez was pulled over and arrested in Louisiana on Saturday afternoon, the Caddo Parish Sheriff’s Office said in a news release Sunday. He was taken into custody without incident on Saturday in Shreveport, Louisiana, authorities said. According to the release, he was charged with multiple warrants for armed robbery out of Ohio and a murder warrant out of Michigan.

The man killed was identified as Hussein Murray, a 72-year-old from Rochester Hills, Michigan, the Oakland County Sheriff’s Office said in a Facebook post.

Authorities allege that Hernandez and another unidentified man arrived at the home where Murray lived with his wife twice, first on Thursday and then again on Friday. On both occasions, officials said they posed as workers for DTE, a Detroit-based utility, and claimed they were there to investigate a gas leak.

According to the Oakland County Prosecutor’s Office, Murray and his wife did not let the two men into their home Thursday. When they returned Friday, Murray “signed a document purporting to be from DTE and accompanied the defendant to the basement,” the release said.

The two men then returned upstairs and asked Murray’s wife “where the money and jewelry were,” the statement said. They bound her wrists and ankles with duct tape, punched her in the face and took her phone and watch before driving away in a truck with a DTE sign, according to the news release.

Murray’s wife was able to call 911 and told officers she believed it was her husband kidnapped, according to the Oakland County Sheriff’s Office.

Murray’s body was discovered in the basement and his wrists and ankles were also wrapped in tape, the prosecutor’s office said.

“Due to the gruesome nature of the injuries, it was not immediately clear whether he had been shot or bludgeoned to death,” the sheriff’s office said.

Authorities continue to search for the second suspect, with the sheriff asking the public for information.

“This was a vicious attack on an elderly couple in their home,” Oakland County Prosecutor Karen McDonald said in the news release. “I have approved the highest charge, which carries a life sentence without parole for this brutal crime. My office will work diligently to ensure this individual is held accountable and that the public is protected from violent predators.”

According to the sheriff’s office, Murray’s death was ruled a homicide by the Oakland County coroner on Saturday. His wife was hospitalized after the incident and has since been released, the sheriff added.

Doorbell camera video shows one of the suspects wearing a respirator mask and identifying himself and another man as DTE Energy workers searched for gas leaks, was released by the sheriff’s office Friday.

An investigation is underway to see whether anything was stolen from the house.

“One way or another we will find you,” the sheriff said in a post on Facebook.

Hernandez is currently being held at the Caddo Correctional Center, prison records show. A spokesman for the Caddo Parish Sheriff’s Office told CNN that if Hernandez waives his right to an extradition hearing, the Oakland County Sheriff’s Office will return him to Michigan. Otherwise, an extradition hearing will be required to send him back to Michigan.

“Our condolences go out to the victims of this terrible and tragic event and we hope that the perpetrators are quickly caught and brought to justice,” DTE Energy said in a statement. “Before DTE makes a routine visit to your home, we will endeavor to contact you in advance, either through a call from our call center or via email or text message.”