So far, the investigation into Thompson’s murder has focused on a few pieces of evidence that police are using to identify a suspect.
Police discovered the suspect had been photographed at a nearby Starbucks minutes before the shooting.
While he is masked in the image, police sources told CBS, the BBC’s US affiliate, that the mask is pulled back far enough to show his eyes and part of his nose.
In doing so, investigators use facial recognition software to try to find a match.
In addition, police are testing three shell casings and three live cartridges found at the scene for DNA.
A cell phone was found in an alley along the suspect’s escape route. The police say they are “working through” the phone.
Investigators also said they would search Thompson’s room at the nearby Marriott Hotel, which is down the street from the incident.
