LODI (CBS13) – Authorities say an arrest has been made in the murder of Lodi doctor Thomas Shock.

Lodi police say Robert Elmo Lee, a 79-year-old Lodi resident, Christopher Anthony Costello, 26, and Mallory Stewart, 27, and Raymond Jacquette, 26, have been arrested in connection to the case.

four lodi doctor slaying suspects 4 Arrested In Murder Of Lodi Podiatrist Thomas Shock

From left: Robert Elmo Lee, Christopher Anthony Costello, Mallory Stewart, and Raymond Jacquett.

Lee and Costello are facing charges of murder, conspiracy to commit murder and soliciting to commit murder. The two were arrested on Tuesday.

Stewart, who was arrested late Wednesday morning, is facing charges of murder and conspiracy to commit murder. Both Costello and Stewart are Sacramento residents.

Jacquette was arrested Wednesday night by Lodi police, with assistance from the Sacramento County Sheriff’s Department. He was booked into jail on charges of murder and conspiracy to commit murder.

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No other details about the investigation, including what led up to Shock’s death, have been released by detectives at this point.

“A lot of people were vested in this investigation. They wanted to be closure, and especially for the family. Any time we have these types of cases is the family that needs that closure,” said Sgt. Ricardo Garcia, Lodi Police Department.

Shock was found gunned down in his Lodi home in early August. He was a retired podiatrist who neighbors described as a pillar of the community.

“We did receive a few tips a lot of anonymous tips and it was just following up the clues that were left behind, just great detective work on behalf of our detectives,” he said.

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Shock lived in an upscale neighborhood. He was the father of three grown children, five grandchildren and one on the way.

“I don’t think anyone is every prepared for this. But obviously emotions run high in these situations and we have put a lot of trust faith and patients into the investigative measures,” said Tracy Shock, Dr. Shock’s son. “With over 600 attendees at his funeral services and 90 bike riders at his celebration of life, it made me see the impact he had.”

Police believe they have their three main suspects, but there could be more suspects and that is part of the on-going investigation. They are asking anyone with information on the murder to contact the Lodi Police Department.