Planned Trail Killing Shocks Great Falls

Police say a 19-year-old co-worker armed with a knife tracked and killed a Reston mother near Great Falls, then tried to burn evidence.

Story Snapshot

Fairfax County police arrested Alexis Antonio Cedillos-Campos, 19, in the homicide of Carmen Lizet Puch.
A jogger found Puch with stab wounds near her car by a Great Falls trail early Monday.
Detectives say the attack was targeted, not random, and involved planning before the killing.
The case echoes data showing many women killed at or near work are attacked by someone they know.

Arrest Announced In Great Falls Homicide

Fairfax County Police said Wednesday they arrested Alexis Antonio Cedillos-Campos, 19, in connection with the killing of 42-year-old Carmen Lizet Puch. Officers responded Monday morning to a parking area along Georgetown Pike near Old Dominion Drive, close to a popular trail. A jogger had called 911 after finding a woman with severe wounds near a car. Police identified the victim as Puch of Reston and described trauma consistent with stab wounds.

Police used the department’s social media channels to confirm the arrest and promised more details later in the day. The update followed two days of investigation that included interviews, scene processing, and a search for video along nearby routes. In the post, detectives named Cedillos-Campos and tied him to the Monday morning homicide in the Great Falls area. The announcement did not list formal charges or a court date, which often follow after intake and processing.

What Detectives Say About Motive And Method

Local reports citing police briefings say detectives do not believe the attack was random and are examining ties between the suspect and the victim. Coverage states the victim suffered stab wounds and that investigators also looked at signs of attempted arson tied to the scene or vehicle, suggesting an effort to destroy evidence. Police have said the suspect and victim worked at the same place, and they are probing a possible personal relationship linked to the alleged planning.

Police updates described actions before the attack that point to planning, including the suspect leaving work after getting a knife, traveling to find Puch, and confronting her in the parking area. Reporters who viewed police summaries said detectives believe the suspect tried to set a fire after the stabbing. Prosecutors will decide the final list of charges, which could include first-degree murder and related counts. As in all criminal cases, the suspect is presumed innocent until proven guilty in court.

Why This Case Hits A Wider Nerve

This killing happened in a public space near a trail and a parking lot, where many people expect safety on a weekday morning. National research shows many women killed at or near work are attacked by someone they know, often an intimate partner or a personal relation. A Centers for Disease Control and Prevention study found that about one-third of female workplace homicides involved a personal relation, with many attacks happening in parking areas.

Those numbers help explain why detectives quickly look at known ties in cases like this. They also raise hard questions that both conservatives and liberals ask about prevention that goes beyond politics: early warning at work, protective orders with fast teeth, and real follow-through when threats spill into public spaces. Officials say more information will come as the case moves to court. For now, police stress the community faced no ongoing threat after the arrest.