"Watch this video," police in Tampa tweeted Wednesday in their latest appeal for help finding a suspected serial killer. "Pay attention to the walk. Pay attention to the way he flips his phone." Tampa Police Chief Brian Dugan says the video was taken moments before the Tuesday murder of 60-year-old Ronald Felton, who is believed to be the killer's fourth victim, the Tampa Bay Times reports. Dugan says police have limited information and they are making the appeal "to have someone tell us who is in that video. They could be perfectly innocent, but I don’t think so." He says the suspect strongly resembles a person seen on video before the Oct. 9 shooting of Benjamin Mitchell, the first of four people killed in what police believe is one person's killing spree.
Dugan told reporters Wednesday that "it doesn't matter at this point" whether the killings are the work of one person or multiple people, as long as they stop. He added, however, that the killings appear to be the work of one person targeting random victims. "It's the time, the methodology, the fact that they were all alone," he said. "There is no motive. Nothing is taken or anything like that." The chief said he believes that a strong response from residents in the Seminole Heights neighborhood helped increase the time between the last two killings, but he has been experiencing a "tremendous amount of anxiety" since the murders began. "I don't sleep at night," he said, per ABC. "How could I?"