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 6-carat CVD-grown pink diamond was “deliberately modified” to mimic the appearance of a natural rough diamond, the lab said.

If the Global Diamond Consortium emerges as the top bidder for De Beers, Botswana’s stake will double to 30 percent, Duma Boko said Monday.

An incorrect AI-generated ad or product description can cost your store valuable consumer trust.

With over 50 years experience in the trade, DSF Antique Jewelry offers quality, craftsmanship, condition, and remarkable variety.

These nine individuals and brands are up for a Gem Award in the Jewelry Design, Media Excellence, and Retail Innovation categories.


GIA Analytical Microscopist John Koivula curated the collection of 2,665 crystals, gems, and minerals over a 60-year span.

The “Eclipse” collection, the brand’s first high jewelry line, centers its alligator motif in diamond and spinel jewels.

With customization becoming more expected in engagement ring shopping, the Bridal Builder makes the process tangible.

From a Betta fish brooch to a “dragon’s trove” of zircon eggs, here are seven pieces that’ve stuck with Associate Editor Lauren McLemore.

Groundbreaking New Mexico Governor-elect Deb Haaland wore the earrings, our Piece of the Week, when she declared victory on Tuesday.

Jost goes on an epic journey, traversing rough seas and encountering a cyclops, to discover the perfect holiday gift.

Sponsored by GCAL by Sarine

From shrinking budgets to AI elves, here are five takeaways from holiday reports by Bain, Adobe, Mastercard, NRF, and insights from YouGov.

The designers combined their talents for Little Pet Portraits, hand-painted miniatures of our best friends set in a piece of jewelry.

Its non-bridal fine jewelry remains the star of the show, recently launching new collections inspired by Elizabeth Taylor and Jane Goodall.

“Joy: The Swarovski Musical” features Ariana Grande as the leading lady in scenes inspired by classic musical montages.

The lab will bring back its complimentary next-day service for some reports starting next week.

New collections and relevant marketing pushed the company forward, while Pandora’s lab-grown diamond sales continue to lag.

The citywide celebration, slated for Nov. 16-22, is set to host more than 175 events, including live jewelry-making demos.

Lanessa Elrod, former president and CEO of Louis Vuitton Americas, has stepped into the role as the retailer celebrates 125 years.

A replica of one of the most powerful objects in the Marvel Cinematic Universe, the glove is heading to auction next month in Abu Dhabi.

Klein, who had his own marketing agency and worked for Gabriel & Co. and Trans American Diamond, is remembered as a kind man.

To enter the giveaway, locals can purchase a featured beverage from one of eight participating restaurants in Houston and Austin, Texas.

The grant recipient will be awarded $50,000 as well as mentoring meetings with executives at David Yurman and other industry executives.

The winners include a non-NAJA member seeking training, a member beginning NAJA courses, and a member becoming a Certified Master Appraiser.

The rare jewel, which has links to Russia’s Romanov dynasty, is estimated to fetch up to $2 million.

It is one of several seizures of counterfeit jewelry and watches by U.S. Customs and Border Protection officials in Louisville this year.
























