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Social media apps on a smartphone. For illustrative purposes only. Image Credit: Agency

Las Vegas: A man has been convicted of murder in a drug-related robbery killing in Las Vegas after initially being identified as a suspect because a friend of the victim thought to check and preserve a Snapchat message.

Jurors on Thursday convicted 25-year-old Montrell Russum of murder, robbery and conspiracy in the 2018 killing of 25-year-old Martell Williams.

The Las Vegas Review-Journal reports that Williams was found dead by a friend, Brandon Boisclar, who said he immediately wondered with whom Williams had last been in contact.

Bosclair said he saved a Snapchat message on Williams' phone, and detectives then used the message to identify Russum.

Snapchat messages typically can be seen for only a brief period of time.

Detectives also used cell tower records to identify two other suspects. They await trial.