Diane Richardson
Media Relations Office
(301) 609-6557 or (240) 682-1658

On March 16 at 1:25 p.m., officers responded to the 3100 block of Heathcote Road in Waldorf for the report of a stabbing. When officers arrived, they located a 16-year-old male with stab wounds to his chest. He was flown to a hospital and admitted in stable condition. The suspect, Conall Robert Keller, 16, of Waldorf, was arrested on the scene. A preliminary investigation revealed the suspect and victim are known to each other and the suspect stabbed the victim over a disagreement related to the sale of a pack of cigarettes. Keller was subsequently charged as an adult with attempted first-degree murder, first-degree assault and second-degree assault. Anyone with additional information relating to this case is asked to call Detective Johnson at (301) 609-6453. Tipsters wishing to remain anonymous may contact Charles County Crime Solvers by calling 1-866-411-TIPS or submitting a tip online at or by using the P3Intel mobile app.

Conall Robert Keller

The Charles County Sheriff’s Office is a full-service law enforcement agency comprised of more than 600 police, corrections and civilian personnel responsible for protecting more than 150,000 residents. The CCSO was accredited by the Commission on the Accreditation of Law Enforcement Agencies (CALEA) in 2001 has been designated as a CALEA Gold Standard of Excellence agency since 2011. Established in 1658, the CCSO is one of the oldest law enforcement agencies in the United States. For more information, visit

Charles County Crime Solvers offers rewards of up to $1,000 for information that leads to the arrest or indictment of a person responsible for a crime in Charles County. All individuals who provide tips through Crime Solvers will remain anonymous. Anyone with information about an unsolved crime or the location of a fugitive may contact Charles County Crime Solvers by calling 1-866-411-TIPS. Tips can also be submitted online at or by using the P3Intel mobile app, which can be found in the Android Store and Apple store by searching P3tips. For more information about the P3 program, click on this link: