Crime

Man Convicted of First-Degree Murder in Death of Colorado Jeweler

CrimeAug 11, 2025

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.

Vigil for slain Wheat Ridge, Colorado jeweler Peter Damian Arguello
Shortly after the November 2023 murder of jeweler Peter Damian Arguello, the community held a vigil outside his store, Peter Damian Fine Jewelry & Antiques. Last week, one of the two men charged in connection with Arguello’s murder was found guilty of first-degree murder, among other charges. (Photo courtesy of @WheatRidgePD on X)
Wheat Ridge, Colo.—A jury in Jefferson County, Colorado, has convicted the man charged in the November 2023 murder of a jeweler in a Denver suburb.

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.

 Related stories will be right here … 

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.

Mugshots of Charles Robinson Shay and Michael McCormack
Charles Robinson Shay, right, was found guilty in the murder of jeweler Peter Damian Arguello, while Michael McCormack’s trial is scheduled to start later this month. (Photos courtesy of the Wheat Ridge Police Department)


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

De Beers London Vibrations high jewelry Echo transformable necklace
CollectionsSep 28, 2026
De Beers London Drops Water-Inspired High Jewelry Collection

“Vibrations” features several firsts for De Beers’ high jewelry, including the use of chalcedony and diamonds sourced from artisanal miners.

Zoë Kravitz Wearing Jessica McCormack’s Bows Collection
CollectionsSep 28, 2026
Jessica McCormack Turns to Classic Motif for New Collection

The “Bows” collection features three interpretations of the bow motif designed with Georgian and Victorian influences.

Amanda Coleman-Phelps and Guy Borenstein
Events & AwardsSep 28, 2026
Guy Borenstein, Troy Underwood Among the Professionals Honored at AGS Conclave 2026

The American Gem Society recognized industry members, one Guild, and a law enforcement official for their contributions to jewelry.

1872 x 1052 Gemolite.jpg
Brought to you by
Meet Gemology’s Next Generation Microscope: GIA® Gemolite® NXT Professional Edition

Experience gemstones with greater precision and comfort than ever before.

Jewelers Mutual Instappraise screenshot mock up
FinancialsSep 28, 2026
Instappraise, Jewelers Mutual Look to Simplify Jewelry Insurance

Through a new system integration, customers can now receive instant personal jewelry insurance quotes at the time of appraisal.

Weekly QuizSep 25, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Rolex Datejust 31 ref. 6827 and Rolex Lady Datejust ref. 6917
WatchesSep 25, 2026
Smaller Rolex Watches Showing Strength on Secondary Market, Data Shows

Five of the 10 fastest-appreciating Rolex models on Bob’s Watches were Datejust 31 or Lady Datejust watches.

Daniel’s Jewelers storefront
MajorsSep 25, 2026
Sherwood Family Buys Back Daniel’s Jewelers from Private Equity

The Sherwood family and AJS Creations CEO Tejas Shah purchased the jewelry chain back from Palladium Equity Partners.

Cover.jpg
Brought to you by
Your Piece Could Be the One Editors Talk About

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

Brilliant Earth The Elizabeth Taylor Collection Campaign Imagery
Lab-GrownSep 25, 2026
Brilliant Earth Collabs with Elizabeth Taylor Estate on Jewelry Collection

“The Elizabeth Taylor Collection” uses lab-grown diamonds and gemstones in contemporary designs inspired by the icon.

Dana Rebecca Alexa Jordyn Marquise Marge hoops
TrendsSep 25, 2026
A Peek at Taylor Swift’s Game-Day Diamonds

The artist wore Dana Rebecca Designs’ marquise diamond-set gold hoops at the Chiefs game last Sunday. Now they’re our Piece of the Week.

Header - One platform_ total protection_ seamless shipping (1).png
Supplier BulletinSep 24, 2026
Ship with Confidence with JM Shipping Solution

Sponsored by JM Shipping

8.03 carat natural fancy light blue diamond
AuctionsSep 24, 2026
8-Carat Blue Diamond Heads to UK Jewelry Auction

The fancy light blue diamond is estimated to fetch up to $2.6 million at Elmwood’s next week.

Secret Language of Victorian Jewelry by Amy Azzarito
TrendsSep 24, 2026
This New Jewelry Book Decodes the Secret Meaning in Victorian Jewelry

“Secret Language of Victorian Jewelry” unveils the meaning behind the symbols, motifs, and gemstones used in Victorian-era jewelry.

Lab-grown diamond tennis bracelets and rings from Kira Jewels
Lab-GrownSep 24, 2026
Kira Jewels Opens B2B E-Commerce Portal for Lab-Grown Diamond Jewelry

KIRAJewels.one gives retailers access to more than 500 SKUs of lab-grown diamond rings, earrings, necklaces, and bracelets.

Dana Rebecca Designs Tennis Bracelets Campaign Imagery
TrendsSep 23, 2026
Holiday Diamond Jewelry Trends: Layered Looks, Personalization

This holiday season, look to pieces that will help to fill out customers’ everyday diamond jewelry wardrobe, experts say.

The logo for The Diamond Collective, the new name for the Natural Diamond Council
SourcingSep 23, 2026
Organization That Promotes Natural Diamond Rebrands for Third Time

The Natural Diamond Council is now The Diamond Collective and has announced a new strategy under CEO Amber Pepper.

Paul’s Jewelers 7Cs Cafe
IndependentsSep 23, 2026
This Milwaukee-Area Jeweler Is Serving the 7Cs

Paul’s Jewelers sells coffee, chocolate, and cookies from a custom gold-wrapped trailer parked outside the store starting at 7 a.m.

Kay Love All In campaign
MajorsSep 23, 2026
Kay Jewelers’ New Campaign Goes ‘All In’ on Love

Part of its brand relaunch, the marketing around the campaign includes a contest involving a jacket set with 550 diamonds.

Jean Schlumberger’s Hedges and Flowers Necklace
Events & AwardsSep 23, 2026
Tiffany & Co. Exhibition Opening at Arkansas Museum

The curation, opening soon at the Crystal Bridges Museum of American Art, honors the jeweler’s heritage through a distinctly American lens.

Pandora x Pat McGrath campaign image
CollectionsSep 23, 2026
Pucker Up for Pandora’s New Pat McGrath Jewelry Collab

The jewelry giant has partnered with the famed makeup artist to create a colorful new collection of charms and rings.

Texas Jewelers Association
IndependentsSep 23, 2026
Texas Jewelers Association to Celebrate 120th Anniversary

The association will mark the milestone at its convention next month.

Sissy’s Log Cabin Back to School and Bling 2026
IndependentsSep 23, 2026
Sissy’s Log Cabin’s ‘Back to School and Bling’ Event Returns

The jeweler donated school supplies to Memphis, Tennessee, students during the event combining basketball and mentorship.

Pandora and Foundrae medallions
MajorsSep 22, 2026
Foundrae’s Lawsuit Against Pandora Can Continue, Court Rules

A federal judge denied Pandora’s motion to dismiss Foundrae’s claim for copyright infringement of its medallions.

The Retail Smiths Peter Smith
ColumnistsSep 22, 2026
Peter Smith: Our Struggle With Emotional Selling

People aren’t thinking rationally when they are buying luxury products, and we shouldn’t be selling them that way, Peter Smith writes.

Constance Polamalu
IndependentsSep 22, 2026
Constance Polamalu Named to '40 Under 40' List

The Baltimore Business Journal recognized the entrepreneur for her leadership in business and the jewelry industry.

Photo collage of new GCAL by Sarine lab in Mumbai
GradingSep 22, 2026
GCAL by Sarine Opens New Lab in Mumbai

The facility is located within SEEPZ and is GCAL by Sarine’s second location in India, joining its existing grading lab in Surat.

NYC Jewelry, Antique, & Object Show Autumn Edition Imagery
Events & AwardsSep 22, 2026
NYCJAOS Returns for Autumn Edition

The four-day show is slated for Nov. 19-22 at the Metropolitan Pavilion in New York City’s Chelsea neighborhood.

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy