‘Worst Neighbor Ever’ Examines Moncy Shirley and the Deadly Richmond Hill Explosion

Netflix continues to expand its true crime offerings with the latest episode of ‘Worst Neighbor Ever,’ which delves into one of Indianapolis’s most tragic criminal cases. The second episode focuses on Monserrate ‘Moncy’ Shirley, a woman who was once cherished in her community but became embroiled in a scheme that resulted in the deaths of two of her neighbors.

This docuseries reveals how a seemingly normal suburban life spiraled into a tale of arson, fraud, and heartbreak. The episode, titled “Midwest Meltdown,” introduces viewers to the residents of Richmond Hill, a gated community in Indianapolis where neighbors were known to be “all best friends.”

Monserrate Shirley moved to Richmond Hill in the early 2000s with her then-husband John and their young daughter. Originally from Puerto Rico, she pursued nursing in the United States and established a career as a professional nurse. Known affectionately as Moncy, she was considered a vital part of the close-knit community.

She formed strong bonds with the women in her neighborhood and became a maternal figure to many local children. However, her life took a drastic turn around 2009 when her marriage to John began to deteriorate, leading her to seek a divorce. Concerns arose in the neighborhood when her new boyfriend, Mark Leonard, moved in, especially due to his criminal past.

Investigators later discovered that Leonard had a history of targeting recently widowed women, having financially exploited at least three others before focusing on Shirley in 2011. This time, however, his ambitions reached far beyond mere financial gain.

On November 10, 2012, Shirley’s home exploded, tragically killing her next-door neighbors, John “Dion” Longworth and his wife Jennifer. The explosion injured seven others, caused four million dollars in property damage, and left thirty-three homes beyond repair, necessitating their demolition.

Court testimonies revealed that Leonard had promised Shirley a lucrative scheme, and despite her doubts, she went along with it. Investigators found that the personal insurance on the home had recently been raised to three hundred thousand dollars.

Shirley increased her home insurance to match that amount while Leonard rigged the house with a gas line and a microwave designed to trigger the explosion. They boarded Shirley’s daughter’s cat, Snowball, before heading to a casino for the night, awaiting their anticipated payout. Reports indicated they had attempted this plan unsuccessfully on two previous occasions.

Initially, police suspected the explosion was accidental, but the investigation soon suggested foul play. Prosecutors argued that the trio filled the house with natural gas and used a microwave spark to ignite the blast.

Monserrate Shirley, Mark Leonard, and Leonard’s half-brother Bob Leonard faced charges of murder and arson for the deaths of Dion and Jennifer Longworth. Two additional men, Gary Thompson and Glenn Hults, were later implicated in the scheme.

While the trio could have faced the death penalty under Indiana law, prosecutors opted for life sentences without parole, believing a jury might not convict without clear intent to kill. Shirley managed to avoid a life sentence through a plea deal, agreeing to testify against her co-conspirators and disclose details about the insurance fraud.

She pleaded guilty to conspiracy to commit arson, asserting in court that she thought Leonard and Bob only intended to start a minor fire for insurance money. After the explosion, she claimed the men threatened her and her daughter, with Leonard allegedly warning her of dire consequences if she spoke out.

Her defense argued that she was trapped in an abusive relationship and coerced by Leonard, with a psychologist diagnosing her with dependent personality disorder. However, the expert acknowledged that this diagnosis did not absolve her of responsibility.

On December 20, 2016, Shirley was sentenced to fifty years in prison, the maximum under her plea agreement. During sentencing, Judge Sheila Carlisle heard from Shirley’s former neighbors, many of whom requested the maximum penalty, with Dion Longworth’s sister expressing that Shirley should never be allowed to see her daughter again.

Shirley is currently incarcerated at the Indiana Women’s Prison in Indianapolis, with a potential release date of December 19, 2037, when she will be seventy-two years old. Her co-defendants faced different fates; Mark Leonard was convicted on multiple counts and sentenced to two consecutive life terms before passing away in prison in 2018, while Bob Leonard received two life sentences without parole, and Gary Thompson was sentenced to thirty years after pleading guilty.

The ‘Worst Neighbor Ever’ episode leaves viewers questioning how a friendly nurse from a close community became central to one of Indiana’s most notorious criminal cases. Did Moncy Shirley deserve leniency as a manipulated victim, or does her involvement in the deaths of Dion and Jennifer Longworth make her equally culpable? Share your thoughts after watching the episode.