|Full name||Theo Mercier|
|Cause of death||Blood loss and asphyxiation|
|Residence||Pacific Bay, U.S.|
|Family||Hugo Mercier (father)|
|Partner(s)||Dinah Cooper (ex-girlfriend) †|
|Appears in||Criminal Case|
|First appeared||Case #21: Under the Thunderdome (s2)|
Theo, the son of Hugo Mercier, was a thief accused of multiple robberies. He was a dark-skinned, black-haired man with a light stubble and a mole near his lips. He wore a gray beret and donned a sky blue shirt accompanied with a gray vest. Besides that, he wore a pair of blue denim jeans.
During a collaboration between local and military authorities for the purpose of reinforcing security, Colonel Spangler saw a military crate opened without his permission. Amy and the player intervened, only to find a thief named Theo Mercier stuffed inside, dead with a weather vane impaled through his throat, as if the killer used it as a Roman gladius (short sword). Amy and the player did not hesitate to ship the body to Roxie for autopsy.
In spite of running out of energy having to assist her aunt evacuate Jazz Town's hurricane-battered zones, Roxie concluded the following for her autopsy: Theo died from a combination of blood loss and respiratory failure. The weather vane (found force-fed in the victim's mouth) was confirmed as the murder weapon due to the killer using it as a short sword in spite of Roxie spotting the rooster part of the weather vane missing. Roxie could not help but spot blurred fingerprints with chicory traces imprinted on the half that was jammed on the victim's throat, suggesting that the killer drank a coffee-like drink called chicory.
When Chief Marquez ordered Amy and the player to clear the Thunderdome (at the Army's request), the player found a pile of evacuation supplies and managed to find the upper half of the murder weapon, which the player found a blood-stained bandana as well as skin cells stuck on the weather vane ornament respectively. Both lab samples were sent to Yann for analysis. After careful physical analysis, Yann was able to determine that the skin cells stuck on the weather vane suggested that the killer was a male despite the difficulty Yann had to go through with the skin cells. In addition, Yann was able to determine that the killer had a mud stain since the bandana was not potent enough to protect the killer from sustaining them on their clothes.
Killer and motives
The killer turned out to be pharmacist Claude Lamothe.
Claude was disgusted about Theo's constant thievery of his pharmacy and believed Theo's actions put lives in Jazz Town in jeopardy (given the regulations placed on prescription medicine) as Theo believed everyone should have access to quality medicine. The visit before Theo's death, Claude tried to reason with him, but to no avail, prompting Claude to commit the murder. Claude grabbed a weather vane that was broken during Hurricane Yves, followed Theo to the Jazz Town Thunderdome with a GPS, confronted the victim, and ended Theo's life by thrusting the weather vane into his throat. Afterwards, Claude placed Theo's body in a military crate and fled the crime scene before Colonel Spangler arrived. Claude tried desperately to convince Amy and the player that the murder was warranted to avert unlawful use of controlled prescriptions, but Amy made clear that the law was the law and no one's allowed to take the law into their own hands.
The Honorable Dante told Claude in court that he could have no more free lollipops in the pharmacy, but going on-topic Judge Dante told Claude that murder does not fall into the best of the public good's interest but Claude told Judge Dante that he saved Jazz Town from an unlawful prescription distribution spree that would potentially become catastrophic. Judge Dante (mirroring what Amy told Claude) stated that vigilance with violence does not pay under any circumstances, and weighing both the brutality of the murder not to mention Claude's illicit vigilance were grounds for a 25-year jail sentence without parole for Claude.