RHOSLC Star Mary Cosby's Troubled Son Dies After Domestic Violence Allegations

The tragic story of Robert Cosby Jr. raises questions about domestic abuse, substance abuse, and family dynamics.

Apr. 12, 2026 at 10:21pm

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An abstract close-up image of shattered glass and spilled pills, captured in dramatic, high-contrast studio lighting to convey the complex emotions and hidden struggles behind the glamour of celebrity life.The tragic story of a reality TV star's son exposes the hidden realities of domestic violence and substance abuse within the glitz of celebrity culture.Salt Lake City Today

The tragic story of Robert Cosby Jr., son of 'RHOSLC' star Mary Cosby, has unfolded with a series of unfortunate events leading up to his untimely death. This case raises important questions about domestic violence, substance abuse, and the complexities of family dynamics. Robert Jr. was accused of domestic violence by his ex-wife, Alexiana Smokoff, in 2024, and he later faced legal troubles and an overdose death in 2026.

Why it matters

This case highlights the devastating impact of domestic violence and substance abuse, and the importance of early intervention, support for victims, and comprehensive rehabilitation programs. The media's role in shedding light on such issues is crucial, as it can spark important conversations and potentially save lives.

The details

In May 2024, Alexiana Smokoff called the police, claiming that Robert Jr. became enraged after she disposed of his drugs. This incident of alleged domestic violence was brought to light in November 2025, when Smokoff filed for divorce. Mary Cosby initially denied her son's violent behavior, stating that she didn't raise him that way. Robert Jr. admitted to being on fentanyl during the alleged incident. After the divorce was finalized in early 2026, Robert Jr. faced legal troubles, including violating a protective order and being charged with felony assault. He was found dead on February 23, 2026, after an overdose call turned into a death investigation.

  • In May 2024, Alexiana Smokoff called the police, claiming that Robert Jr. became enraged after she disposed of his drugs.
  • In November 2025, Alexiana Smokoff filed for divorce and brought the alleged domestic violence incident to light.
  • In early 2026, the divorce between Robert Jr. and Alexiana Smokoff was finalized.
  • On February 23, 2026, Robert Jr. was found dead after an overdose call turned into a death investigation.

The players

Robert Cosby Jr.

The troubled son of 'RHOSLC' star Mary Cosby, who faced allegations of domestic violence and substance abuse issues before his untimely death.

Alexiana Smokoff

Robert Cosby Jr.'s ex-wife, who called the police in 2024 alleging that he became enraged after she disposed of his drugs.

Mary Cosby

The 'RHOSLC' star and mother of Robert Cosby Jr., who initially denied her son's violent behavior.

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What they’re saying

“I didn't raise him that way.”

— Mary Cosby

The takeaway

This case serves as a stark reminder of the devastating impact of domestic violence and substance abuse. It highlights the importance of early intervention, support for victims, and comprehensive rehabilitation programs. The media's role in shedding light on such issues is crucial, as it can spark important conversations and potentially save lives.