Ladue Woman Charged in Ex-Boyfriend's Burglary, Warhol Theft

A Ladue woman accused of ransacking her ex-boyfriend's mansion is due in court next month, charged with second-degree burglary after investigators say her own court-ordered ankle monitor helped place her at the scene. Shannon Frost is accused of stealing her ex-boyfriend's cars and other valuable items, including a silver 2024 Porsche 911, a white Jaguar F-Type, a black Jeep Wrangler, three firearms and ammunition, an Andy Warhol print, rare leather-bound books and a grandfather clock, all taken from a home in the 10000 block of Conway Road sometime between December 26 and December 31, 2025. The break-in first came to light when the victim's landscaper contacted Ladue police after spotting signs of a possible burglary, according to FOX 2. Investigators soon found that three vehicles were missing from the residence, and detectives began piecing together a timeline built partly on Frost's own ankle monitor. Ankle-monitor data placed Frost at the victim's Conway Road house on December 26, 2025, where she reportedly spent 45 minutes inside. Because pretrial GPS monitoring devices continuously log satellite coordinates that vendors archive for law enforcement, per court-procedure explainer Hensley Law Office, that kind of tracking data can become admissible physical evidence once its chain of custody is verified. Frost and the victim had broken up in October, and police say she was angry with him after the split. The victim had previously given Frost permission to drive the Jeep, according to the same report, which may explain how she knew her way around the property before the alleged theft spree began. Just after midnight on December 31, 2025, an orange Jeep belonging to a man identified as Andrew W. Montgomery — the person Frost reportedly knew as 'Drew' — was seen following the stolen Porsche near a Ladue fire station. Frost had traveled to one of Montgomery's known addresses in the 9700 block of Ventura on December 26, 2025, the same day her ankle monitor placed her at the victim's home, the station's report notes. Montgomery's cellphone data also placed him near the Conway residence on December 30, 2025. Ladue police found the stolen Porsche abandoned in the 9600 block of Jacobi Avenue on New Year's Day 2026. That same day, officers located the stolen Jeep at River City Casino, an 80-acre riverfront gaming resort in Lemay operated by Penn Entertainment, according to Wikipedia, roughly 15 miles southeast of Ladue. The man driving the Jeep was taken into custody at the casino and told police he had gotten the vehicle from Montgomery. Police also found one stolen firearm in Montgomery's Jeep, along with a check for $4,000 whose memo line read simply 'Andy Warhol' — an apparent reference to the stolen print. The following day, January 2, 2026, Ladue police found the stolen Jaguar and arrested the man driving it. The case has taken sharply different turns for the two accused. Frost was issued a criminal summons rather than an arrest warrant, a procedural distinction that in Missouri means a defendant is directed to appear voluntarily in court without being taken into physical custody or posting cash bail, per legal explainer Scrivner Law Firm. She is due in court Monday, October 5. Montgomery has remained in custody. He is also accused of burglarizing a home in Creve Coeur with another person on February 8, 2026 — a city bordering Ladue to the north with roughly 18,000 residents, according to U.S. Census Bureau estimates. Montgomery was additionally arrested in April 2026 for crimes committed in St. Louis dating back to October 2024. The St. Louis County Prosecuting Attorney's Office has charged Frost with second-degree burglary, a Class D felony under Missouri Revised Statutes § 569.170 that carries a maximum of seven years in state prison, up to one year in county jail, or fines up to $10,000, according to legal reference site FindLaw. Among the stolen items, Frost had taken an interest in the victim's leather-bound books, but the Warhol print may carry the highest dollar value. Original Warhol screen prints and trial proofs typically evaluate from tens of thousands of dollars to more than $100,000 on the art market, according to Smithsonian Magazine, making such works frequent targets for federal art crime investigators. Separately, Missouri law classifies theft of any firearm as an automatic felony stealing offense regardless of the weapon's value, per Justia Law, meaning the three firearms and ammunition taken from the Conway Road home could expose defendants to additional charges beyond the burglary count. It remains unclear whether prosecutors will file additional felony stealing counts tied to the firearms and artwork once full appraisals and forensic testing are complete. The break-in stands out for its scale in a community where such crimes are rare: Ladue's overall annual burglary rate runs roughly 59% below the national average, according to crime-data tracker DoorProfit, in a St. Louis County suburb where median household income tops $240,000. Court records will show how the case against both Frost and Montgomery unfolds in the weeks ahead.