"Someone is terrorizing'' Seminole Heights after third slaying in 11 days 
 
 TAMPA — When asked Friday if Tampa police believe a serial killer is stalking the residents of Seminole Heights, interim Tampa Police Chief Brian Dugan paused for a moment. 
 
 "We can call it what we want," said a clearly frustrated Dugan, who called a news conference to talk about the discovery Thursday of yet another body, the third person to be shot and killed in the neighborhood in 11 days. "If that brings attention to it, that's fine." 
 
 The latest killing took place about 8 p.m. Thursday, Dugan said. It was both frustrating and hauntingly tragic. 
 
 Anthony Naiboa, 20, should not even have been in the southeast part of Seminole Heights when he was shot, apparently without motive. After he left work Thursday night, he got on the wrong bus. His body was found near the intersection of 15th Street N. and E. Frierson Avenue, just 200 yards from where he left the bus and began walking. 
 
 Police officers who were flooding the area because of the two previous murders heard the gun shots, Dugan said, but arrived too late. The shooter was gone. 
 
 Authorities are releasing little information about their investigation, which is being assisted by the FBI. The three victims, Naiboa, Benjamin Edward Mitchell, 22, and Monica Caridad Hoffa, 32, are all connected by proximity and time-frame, said Dugan, who declined to say whether there is any connection between the type of weapon or ammunition used in the killings. 
 
 As of now, he said, there is no suspect or motive. 
 
 In addition to the FBI's help, Dugan said the Hillsborough County Sheriff's Office and St. Petersburg Police have offered support. Crime Stoppers and the Bureau of Alcohol, Tobacco, Firearms and Explosives are teaming up on a $25,000 reward for information that leads to a suspect's arrest. 
 
 Meanwhile, the hunt continues. 
 
 "I go from frustration to anger,'' Dugan said. "Now we have someone terrorizing the neighborhood. It's just difficult to see this happen." 
 
 ••• 
 
 Naiboa's father began to worry Thursday night when his son didn't come home. He finally called police. 
 
 "We had to regretfully inform him that his son had been murdered," the chief said. 
 
 The father of Benjamin Mitchell, whose body was found Oct. 9, was still grappling Friday with his loss along with the news that someone else's son had been killed. He met Friday with Naiboa's parents and they grieved together. 
 
 "To hear there was a third victim, and for him to meet Anthony Naibo's parents this morning, you can just imagine what's that's like," Dugan said. 
 
 Authorities have said repeatedly that the victims did nothing wrong and there is no connection between them. 
 
 But there are similarities. 
 
 All three victims were bus riders and all three were shot at or near bus stops. Mitchell and Naiboa both attended Middleton High School. 
 
 Mitchell was waiting for a bus at the stop on North 15th and E. Frierson when he was shot. Two days later, Hoffa was killed, but it would be another two days until her body was found on the 1000 block of E. New Orleans Avenue — about six blocks west of the Ellicott Street bus stop on the No. 9 line. A city worker found her body in a vacant lot. 
 
 Naiboa was found at North 15th and Conover streets, a few hundred yards south from the No. 9 bus stop where he had gotten off and where Mitchell was killed 11 days earlier. 
 
 Hoffa did not drive and relied heavily on public transportation, said Caz Taylor, 34, a close friend of Hoffa. 
 
 "Every day she was walking to the bus stop," Taylor said. "That was not unusual. Her main mode of transportation was her feet." 
 
 Taylor met Hoffa when the two were teens and saw each other nearly every day until Taylor moved to Ohio. 
 
 "She was so witty and smart," Taylor said. "She made friends everywhere she went." 
 
 A Celebration of Life service for Hoffa is scheduled for Saturday at the Gonzalez Funeral Home, 7209 N. Dale Mabry Highway in Tampa. 
 
 Mitchell was attending classes at Hillsborough Community College, where he majored in psychology. 
 
 His cousin, Sheree Allen, said the family moved to Tampa from Las Vegas 10 years ago, hoping for a better life. 
 
 "He could be himself here," she said. "He wasn't bullied and kids wouldn't pressure him into things. He kept out of trouble." 
 
 ••• 
 
 Southeast Seminole Heights is roughly bordered by Nebraska Avenue to the west, 15th Street to the east, Hillsborough Avenue to the north and Dr. Martin Luther King Jr. Boulevard to the south. 
 
 In the wake of the shootings, police said they have "blanketed the area" with officers and sent alerts to residents via Alert Tampa. 
 
 Mariah Jackson, 18, described heavily armed police entering her Seminole Heights home shortly after 12:30 a.m. Friday. 
 
 "They said they were looking for a body," Jackson said. 
 
 Detectives also are talking with residents, collecting surveillance video and showing the video of a man recorded walking in the area when the first murder occurred. 
 
 Dugan cautions residents not to assume the person in the video is white or black, male or female. Investigators want to know what the person saw and eliminate him or her as a suspect. 
 
 At this point, authorities do not believe the killings are connected to the shooting death of Dontae Lampkins, 25, whose body was found Jan. 26 in an alleyway between E Mohawk and Comanche avenues in the Hampton Terrace neighborhood of Seminole Heights. 
 
 Dugan says residents should keep their porch lights on, stick together and pay attention to their surroundings. That means looking up from smart phones as they're making their way around the neighborhood. 
 
 Residents shouldn't hide in their homes, though, the chief said. 
 
 "Do cookouts, walk your dog," he said. "We're not going to be held hostage by whoever's doing this." 
 
 The chief also had a message for the shooter. 
 
 "Enough is enough," he said. "I don't know what your motive is. I don't know what your problem is. There's been enough carnage. You have severely affected some families." 
 
 RELATED: Infamous killers of Tampa Bay, a region familiar with horror 
 
 PREVIOUS STORY: : Another suspicious death in Tampa's Seminole Heights 
 
 PREVIOUS STORY: Police release surveillance video, tell Seminole Heights residents to avoid walking alone 
 
 Contact Howard Altman at [email protected] or (813) 225-3112. Follow @haltman. Staff writers Jonathan Capriel and Richard Danielson contributed to this report. ||||| (CNN) Tampa police released a new video on Thursday showing a "person of interest" seen running away from the first of three recent homicides that have baffled investigators and prompted fears of a serial killer. 
 
 The grainy surveillance video, taken at different angles, shows the same person who was seen walking along a street in the historic Seminole Heights neighborhood in an earlier video released by police. 
 
 "I've come up with four reasons why this person is running," interim Tampa Police Chief Brian Dugan told reporters. "One, they may be late for dinner. Two, they're out exercising. Three, they heard gunshots and, number four, they just murdered Benjamin Mitchell." 
 
 The 22-year-old Mitchell became the first victim when he was shot and killed in front of his home on October 9. 
 
 The second victim, Monica Hoffa, 32, was killed October 11. Her body was found two days afterward by a city employee in a vacant parking lot half a mile from where Mitchell died. 
 
 Then a week ago, Anthony Naiboa, an autistic 20-year-old who had just graduated from high school, became the third victim after he accidentally got on the wrong bus after leaving work and ended up in the southeast Tampa neighborhood by mistake, police said. Authorities believe he was making his way to another bus stop but did not get more than 200 yards before he was shot and killed October 19. 
 
 WATCH VID: https://t.co/XwauE5YCHG 
 
 We believe this person may have ties to the Seminole Heights area. Contact @crimestopperstb pic.twitter.com/QAmp8UTlMf — TampaPD (@TampaPD) October 26, 2017 
 
 'Ties to the neighborhood' 
 
 From left, Benjamin Mitchell, Anthony Naiboa and Monica Hoffa were killed within 11 days in a Tampa, Florida, neighborhood. 
 
 Dugan said the person in the video is not considered a suspect in the string of shootings that have residents of Seminole Heights on edge. 
 
 "He may have seen something or heard something," the chief said of the person, who is seen flipping what appears to be a cellphone in their right hand while walking. 
 
 "That might be a habit of this person," Dugan said of the phone flip. "At this point, everything is a clue, everything is a speculation." 
 
 In the video, the person is seen walking in one direction, then running the opposite way seconds after Mitchell was shot. 
 
 "We believe this person has ties to this neighborhood and we want to speak to them," Dugan said. 
 
 Police have been swarming the Tampa neighborhood amid fears that a serial killer could be on the prowl. 
 
 Tampa Mayor Bob Buckhorn said officials don't have many leads on who is behind the three shootings . Nor do authorities have a motive for the seemingly random acts, he said. 
 
 The three victims were alone and all were found within about a half-mile of each other, Dugan said. 
 
 Few clues 
 
 Police are asking for clues on the person in this surveillance video. 
 
 Police last week released a surveillance video of the same person walking in the area and asked for any information on that person. 
 
 Buckhorn said they didn't have any description of a suspect or suspects and could not even say if the suspect was a man or woman. 
 
 Officials said police have so far avoided calling the suspect a serial killer. 
 
 "We're not using the word 'serial killer' yet because we just don't have enough evidence," Buckhorn said. "We're not afraid of that word -- if we think that that's true, we'll be happy to say it. But we've got to connect the dots." 
 
 On Sunday, hundreds of residents held candlelight vigils for the victims, according to CNN affiliate WFLA 
 
 "We won't be afraid," Casimar Naiboa, the father of one victim, told the crowd. "[The killer] will not get away with it. No way. We are standing right here. We are not scared of them." 
 
 Heightened police presence 
 
 As the investigation goes on, Dugan said there will be a large police presence in Seminole Heights. 
 
 Dugan encouraged people in the neighborhood to turn on their porch lights and keep an eye on the streets. Buckhorn added that the city was cutting undergrowth, clearing alleys and adding streetlights to better get eyes on possible suspects. 
 
 "We are hunting this person down and we're not gonna stop and we're not gonna leave that neighborhood until we find him," Buckhorn said. 
 
 Dugan said the neighborhood was "on edge," particularly with Halloween trick-or-treating coming up. 
 
 "I'm not gonna let someone take over this neighborhood," Dugan said. "I'm not gonna let this community be locked inside their houses."
– When asked Friday if Tampa has a serial killer on the loose, police chief Brian Dugan didn't deny the possibility. "We can call it what we want," the Tampa Bay Times quotes Dugan as saying. "If that brings attention to it, that's fine." Three people have been killed in the Florida city's Seminole Heights neighborhood over the past 11 days. The victims aren't connected to each other and none were doing anything wrong when they were killed, but Dugan says there's "no doubt" the murders are related. Police say all three victims were shot while they were alone at night. And all three were regular bus riders shot at or near bus stops. The three murders happened within a mile of each other. Benjamin Mitchell, a 22-year-old believed to be the first victim, was shot and killed Oct. 9 while waiting for a bus. The body of the second victim, 32-year-old Monica Hoffa, was found in a vacant lot Oct. 11. And on Thursday, 20-year-old Anthony Naiboa, who was autistic, was killed after accidentally taking the wrong bus home from work and ending up in Seminole Heights. Dugan says police, who had "blanketed the area" after the first two killings, heard the shots that killed Naiboa, but the shooter still managed to escape. He says from now on anyone walking alone in Seminole Heights will be considered a potential victim or suspect, WTSP reports. Police have no motive or suspect, though they are attempting to identity a person seen in grainy surveillance footage. A $25,000 reward is being offered for information that leads to an arrest or conviction.