- "Mommy always wore her golden butterfly."
- ―Michelle Moller
The butterfly brooch was an expensive and elegant piece of jewelry, made of gold and studded with small gemstones. Hugo Moller brought the brooch as a make up gift for his wife, after an argument and physically striking her. The brooch served as a testament of Deidre's taste for fancy jewelry and Hugo's potential domestically violent nature.
Events of L.A. Noire
- "I saw him drop the butterfly in the lamplight, and he strolled out, cool as you like, and I went over and I picked it up."
- ― Eli Rooney
The killer proceeded to abduct and brutally murder Deidre, during which the brooch fell from Deidre's coat a landed in a lamplight in the school parking lot. The brooch was found and pocketed by Eli Rooney, a local child stalker and molester, who hoped to sell the brooch for quick cash.
Detectives Cole Phelps and Rusty Galloway investigated Deidre' murder, during which they learned of the butterfly brooch from Michelle, hence suspected the husband, Hugo, as the potential murderer motivated by domestic violence. As Phelps questioned Hugo, he used his knowledge of the butterfly brooch as evidence to support his suspicions. Later while investigating at the Belmont High School, Phelps and Galloway caught Rooney stalking the students hence captured and arrested him. They found the butterfly brooch in Rooney's pocket, which further connected him to the crime scene and instantly implicated Rooney as suspect for Deidre's murder.