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Learn how DNA led Arlington police to suspect in 2017 cold case murder

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Police have arrested a suspect in connection with the 2017 killing of a man at his Arlington apartment.

A 29-year-old Fort Worth man faces a capital murder charge after DNA evidence linked him to a 2017 shooting that left a victim dead at an Arlington apartment, police said in a news release Friday.

Devin Cameron-Mack was already in the Tarrant County Jail on an unrelated offense when homicide detectives obtained a warrant for his arrest, according to the release.

On the evening of Oct. 4, 2017, Arlington police were called to the 2000 block of Valleywood Drive after someone reported a shooting. They found Justin Dotson unresponsive from a gunshot wound. The 25-year-old died at the scene.

Investigators believe Dotson was shot during an attempted robbery connected “with suspected narcotics activity,” police said. Several pieces of evidence were found inside Dotson’s apartment, including a blood stain that was from an unknown person.

The DNA profile from the stain was uploaded into CODIS, the national law enforcement database. This type of testing only works if a suspect’s DNA is already in the system, and no matches were found at the time that could help police identify Dotson’s killer.

That changed in November when CODIS returned a hit on Cameron-Mack’s recently uploaded DNA profile. Cameron-Mack insisted that he wasn’t involved in Dotson’s murder, but detectives obtained a search warrant for another DNA sample. It was a match for what was found at the crime scene, according to the release.

Cameron-Mack is being held in the Tarrant County Jail on a $1 million bond.

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Harriet Ramos

Fort Worth Star-Telegram

Harriet Ramos covers crime and other breaking news for the Fort Worth Star-Telegram.

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Harriet Ramos

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