The home of Monserrate Shirley was the center of the explosion that resulted in the deaths of next-door neighbors John "Dion" Longworth and his wife Jennifer (née Buxton), the injuries of seven others, and $4 million in property damage.

At about 11:10 p.m., on November 10, 2012, a large explosion occurred in Richmond Hill, a subdivision on the southeast side of Indianapolis.

She and her boyfriend, Mark Leonard, who also lived at the residence, told authorities they had left Friday night for a weekend at Hollywood Casino in Lawrenceburg, Indiana.

[8] Prosecutors alleged that on the Friday before the explosion, Leonard and his brother Bob spoke with a neighbor who was a Citizens Energy employee, asking that person about the differences between natural gas and propane.

Bob Leonard's son told investigators that several items were in the van that had been taken from the home, including photos and financial documents.

[9] Investigators discovered a number of allegations of insurance fraud and other scams by Leonard prior to the blast, particularly involving stolen or wrecked automobiles.

[10] Included on the probable cause affidavit were complaints from several women claiming that Leonard scammed them out of thousands of dollars.

[15] Prosecutors contended that the trio filled the house with natural gas and then used the spark from a microwave which could be set in advance to detonate it.

[19] Judge Shelia Carlisle rejected the proposal, noting that no Indiana law authorizes the use of concurrent jury trials.

[23] The plea deal involved Shirley pleading guilty to two counts of conspiracy to commit arson in exchange for testifying against the other suspects.

[14] Shirley admitted raising the limit on her insurance coverage at Mark Leonard's urging, and only went along with the plot out of love for him.

[25] Leonard allegedly asked another inmate at the Marion County jail if he could put him in contact with a hitman, according to the probable cause affidavit.

They claim that Leonard wanted the hit man to force the witness to call 9-1-1 and recant his statement before killing him.

[28] The defense said that what became the Richmond Hill explosion was only supposed to be a "stupid and selfish insurance fraud that went horribly wrong", adding, "Precautions were taken to ensure people weren't harmed."

Psychologist Dr. Stephanie Callaway diagnosed her with dependent personality disorder, but stated under cross-examination that, while the diagnosis explains Shirley's actions, it does not absolve her of responsibility.

[38] Gary Thompson pled guilty to conspiracy to commit arson and was sentenced to 30 years in prison.