Case 140

Richmond Hill

Just after midnight on November 10 2012, a loud and frightening sound erupted in the Indianapolis subdivision of Richmond Hill. The force was so powerful that it registered on a regional earthquake sensor and homes were left rattling from the impact. Emergency services raced to the scene but were unable to save the lives of two residents, Dion and Jennifer Longworth. 

The explosion appeared to have originated from the home of Monserrate Shirley and her partner, Mark Leonard. As investigators sorted through the wreckage of the once picturesque neighbourhood, the question arose – was the Richmond Hill Explosion a tragic accident or part of a deliberate attack?



Casefile Presents



Research & writing – Elsha McGill

Creative direction – Milly Raso

Narration – Anonymous Host



‘Flatline intro’ and ‘Come play with me’ intro and outro –

Audio production – Mike Migas 

Scoring – Mike Migas and Andrew Joslyn



Logo and website design – Paulina Szymanska



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Love and Greed in the Heartland: The Richmond Hill Murders – by Robert L. Snow and Russ McQuid



Mark Leonard VS State of Indiana – October 26, 2017

Mark Leonard VS State of Indiana – May 2, 2017



The Night the Sky Caught Fire: The untold stories of the Richmond Hill Explosion – The Indy Channel

The odd boardings of Snowball – The Indy Channel

Richmond Hill: The scars still remain – The Indy Star

Explosion rips through homes –

Fourth suspect’s arrest provides details in alleged scheme in Richmond Hill explosion – The Indy Star

Firefighter trying to rescue Richmond Hill victim: I could ‘grasp his hand’ –

Funeral arrangements set for couple killed in Indianapolis explosion – WTHR

Mark Ray Leonard back in court for allegedly trying to hire a hitman to kill Richmond Hill witness – The Indy Channel

Hit man revelation upends Richmond Hill trial jury selection – The Indy Star

Richmond Hill resident says blast ‘felt like the end of the world’ – Fox59

Hard-up couple’s gas insurance explosion scam gone wrong left 2 dead and a neighbourhood in shock – The Mirror UK

Mark Leonard sentenced to 50 years in hit-man scheme – The Indy Star

Man convicted on 53 counts for role in deadly house blast – CBS News

Richmond Hill explosion mastermind Mark Leonard dies – Indy Star

Richmond Hill explosion culprit Mark Leonard dies at Indy hospital – Fox59

Bob Leonard says ‘good riddance’ to dead brother in Richmond Hill case – Fox 59

Irsay gives to award named for Indy blast victims – The Herald Bulletin



Dion and Jennifer Longworth’s obituary –

Jennifer and Dion Longworth Memorial Award

‘Devastating crime scene photos from the Richmond Hill explosion’ – CNBC

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