Man Convicted of First-Degree Murder in Death of Colorado Jeweler
Peter Damian Arguello, a jeweler in the Denver suburb of Wheat Ridge, was found dead inside his store in November 2023.

According to an update from the Colorado First Judicial District Attorney’s Office, which serves Jefferson and Gilpin counties, 42-year-old Charles Robinson Shay was found guilty on all 11 charges brought against him in connection with the death of Peter Damian Arguello.
Arguello, 64, was the owner of Peter Damian Fine Jewelry & Antiques in Wheat Ridge, Colorado.
Police found Arguello dead inside of his jewelry store on the morning of Nov. 29, 2023, and began investigating the case as a possible robbery homicide.
They were looking for two men.
One was caught on surveillance video inside the store and was seen attempting to bind Arguello with flex cuffs before shooting him, while another was seen fleeing the scene with the first suspect.
Witnesses told police they saw two men leave through the back door of the jewelry store and jump in a red Chevy Silverado pickup truck that, police later determined, had been stolen and was found torched.
On Dec. 27, 2023, police arrested Shay and charged him with second-degree burglary, as well as felony motor vehicle theft in the second degree and criminal possession of an identification document, after he admitted to police that on Dec. 26, he had pried open the door and entered Peter Damian Fine Jewelry & Antiques.
According to an affidavit filed after Shay’s arrest, he told police he’d heard about the robbery homicide and decided to break in and steal what he could from the store because he knew it was unoccupied.
Ultimately, though, there was nothing in the store for him to take, Shay said.
Evidence recovered from the scene indicated that Shay knew more about Arguello’s murder than he was telling police, as DNA recovered from the flex cuffs left at the scene came back to Shay via the Combined DNA Index System, better known as CODIS.
Shay was charged in Arguello’s murder a couple weeks later, on Jan. 18, 2024.
According to the DA’s office, Shay’s trial lasted seven days, with deliberations beginning on Aug. 4 and the jury returning guilty verdicts on 10 of the 11 counts on the afternoon of Aug. 6.
There then was a second phase of the trial during which the jury weighed an 11th charge, called “habitual criminal,” that, under Colorado law, could add to Shay’s prison sentence.
Jurors heard from four additional witnesses about Shay’s six prior convictions and, after deliberating for an hour, found him guilty of being a habitual criminal, concluding that the prior convictions were “separate and distinct” criminal episodes, the DA’s office said.
The other charges the jury found Shay guilty of are: murder in the first degree, murder in the second degree, second-degree kidnapping, aggravated robbery, second-degree motor vehicle theft, second-degree arson, tampering with physical evidence, second-degree motor vehicle theft, and second-degree burglary.
His sentencing is set for Sept. 10, the DA’s office said, and he faces a mandatory sentence of life in prison without parole on the first-degree murder charge alone.
The second man arrested and charged in connection with Arguello’s murder, 51-year-old Michael McCormack, is slated to go to trial Aug. 22.
The Latest

The high-end jewelry retailer was sold to private investment firm Middle West Partners and a group of longtime clients.

The jewelry designer has partnered with Sofer Jewelry to distribute her 85-piece lab-grown diamond collection.

Dunn, this year’s Single-Store Independent inductee, is passionate about innovation and telling the story of natural diamonds.

Experience gemstones with greater precision and comfort than ever before.

The 24-carat fancy intense pink diamond ring could fetch up to $18 million at the November sale.


The “Island Jewel” candle honors New York City and Puerto Rico and raises money for the island’s water relief efforts.
The partnership will give JA members access to preferred pricing, exclusive benefits, technology solutions, education, and resources.

Submit your pieces for a chance to win in this year's competition.

Stores should expect to see the most customers on Nov. 27, and Christmas week is expected to be hectic too, as Dec. 25 falls on a Friday.

The charm, our Piece of the Week, features brown diamond frozen hot chocolate topped with white diamond whipped cream and a ruby straw.

The top lot of Elmwood’s recent fine jewelry sale in London was a 1.84-carat, D color Tiffany & Co. solitaire diamond ring.

The watch company agreed to sell a 95 percent interest to a group comprised of F.P. Journe, Chanel, and Swiss watch exec Pierre Jacques.

This round of tariff refunds is for importers that have sued over IEEPA tariffs in the Court of International Trade and won.

It revisits the brand’s most requested silhouettes, from "Pillow"-set necklaces and bracelets to "Signature"-set rings and earrings.

The trade-only event includes buying opportunities as well as educational sessions on artisanal mining, the new Paraíba source, and more.

Ara Chanakian, a jeweler at Pattons, took home top honors in every category at Jewelers of Louisiana’s annual jewelry design competition.

The live charity benefit sale in Nashville will also feature gowns, boots, and other memorabilia from the country music legend.

Sponsored by Overnight Mountings

The supplier organization recently joined JA and JVC to have more input on political issues affecting the jewelry industry.

Blue Nile, a Signet Jewelers-owned brand, is now Royal Asscher’s exclusive licensed retailer in North America.

“Royal Oak” pays homage to the brand’s most popular watch model using 18-karat gold as well as diamonds, emeralds, and sapphires.

As part of the transition, Joseph Nicosia has stepped into the role of COO.

Participants now have until Oct. 14 to complete their submissions.

Ahead of the holidays, Smith urges jewelers to take a hard look at who’s buying jewelry, what they’re purchasing, and who’s stopped buying.

In the new consumer-facing campaign, four fashion and lifestyle creators share the stories behind their natural diamond pieces.

FGI President John Orrico is also leaving the company after more than 13 years.

The 2026 edition will feature presentations on alternative materials and design trends, as well as pop-up activations on the show floor.
























