Second Suspect Arrested in Murder of Colorado Jeweler
Wheat Ridge, Colorado police took a 50-year-old man into custody Wednesday following a two-month search.

Late Thursday, the Wheat Ridge Police Department announced the arrest of Michael McCormack, 50.
McCormack faces charges of second-degree murder, second-degree kidnapping, aggravated robbery, and second-degree motor vehicle theft, police said.
He is the alleged accomplice of 41-year-old Charles Robinson Shay of Aurora, Colorado, whom police arrested in December after DNA recovered from a pair of flex cuffs found in Arguello’s store linked him to the crime.
Shay was charged with one count of first-degree murder and two counts of second-degree murder on Jan. 18.
Arguello, 64, owned Peter Damian Fine Jewelry & Antiques, located on W. 38th Avenue in Wheat Ridge, which is about 20 minutes northwest of Denver.
According to an affidavit filed at the time of Shay’s arrest, videos of the robbery homicide show that one man pulled a gun on Arguello and attempted to bind him with the flex cuffs.
Arguello resisted, the affidavit states, and the man shot him three times.
Two persons were seen leaving the jewelry store through the back door and fleeing the scene in a red Chevrolet Silverado pickup truck, which police later determined had been stolen in Glendale, Colorado, the month before the murder.
On Dec. 1, police found the red pickup truck in Centennial, Colorado.
According to the affidavit, it had been set on fire and was badly damaged, but police recovered two hats from the bed of the truck that matched the hats worn by the suspects seen fleeing the scene of Arguello’s murder.
The Wheat Ridge Police Department said Thursday that it issued the arrest warrant for McCormack on March 7 and had been trying to track him down ever since.
With the help of the Jefferson County Sheriff’s Office, Wheat Ridge detectives located McCormack in the Black Hawk area, about 40 miles west of Denver.
He was taken into custody Wednesday with the help of the sheriff’s office and the Black Hawk Police Department.
The Latest

Jeffrey Zimmer's decades of leadership at Reeds Jewelers are defined by integrity, a love of sourcing gemstones, and a heart for community.

The new high jewelry design and production process takes 30 days or less from concept to completion, the auction house said.

The holiday catalog for 2025 features never-before-seen images of more than 100 one-of-a-kind masterpieces.

You deserve to know what you are selling–to protect your customers as well as your business and your reputation.

The brand has released a second installment of its collection of traditional and non-traditional commitment heirlooms.


Corey rescued New England chain Day’s Jewelers, preserving its legacy with strong people skills, pragmatism, and a “get-it-done” attitude.

The Museum of Arts and Design's new exhibition features 75 pieces by the designer, best known for her work in the “Black Panther” films.

The upcoming show provides savvy retailers with the opportunity to stock their cases with best sellers in advance of the holiday season.

Timepieces at Luxury will take place at The Venetian and, like Luxury, will be invitation-only for the first two days.

The auction house named a new global head of jewelry, as well as a new head of the jewelry department for the Americas.

As chairman of Schwanke-Kasten Jewelers, Tom Dixon has been tasked with honoring the past and shaping the future of the family-run store.

Katty Villapando Lyte and Mica Rencher received a $10,000 grant for their business, Shimmer Culture LLC.

The parents of the Dallas Mavericks rookie bought their engagement ring at a Day’s store in Bangor, Maine, in 1997.

The UK-based brand sourced the gemstones, which are fully traceable, from an artisanal mining community in Tanzania.

The trio of Advent calendars include a version with 18-karat gold and lab-grown diamond jewelry in a red lacquer jewelry box.

Created in collaboration with Nymphenburg Porcelain, the lock is part of a four-piece collection that took two years to bring to fruition.

Jewelry industry veteran Alisa Bunger has taken on the role.

The company and industry leader’s two-decade tenure with De Beers will come to a close at the end of the month.

“The Winter Egg” set the world auction record for a Fabergé piece twice at previous Christie’s sales.

The company will pay 1.5x silver’s current spot price for each pound of silver oxide batteries submitted.

The line includes a “Shadow” series crafted exclusively for the new men’s offering and reimagined styles from the brand’s core collections.

The rough on offer was recovered from a newer area at the Montepuez mine.

The retailer’s new collection of engagement rings and fashion jewelry is set with natural diamonds that are traceable via blockchain.

The champagne colorway in her newest “Ombré” collection combines white and trendy brown diamonds, a departure from her usual vibrant hues.

Kosann partnered with the Museum of Fine Arts, Boston, to create a set of necklaces inspired by the artwork on samurai sword handguards.

The brand’s first high jewelry collection, “Tempest” plays with movement while calling to mind the folklore of the sea.

Proceeds from its jewelry raffle will go to a volunteer-run fire and rescue group in the Lightning Ridge area of New South Wales, Australia.