Residents of the Seminole Heights neighborhood reported hearing shots just before 5 a.m. Tuesday. Officers quickly moved in, and found the body of Ronald Felton, 60, who had been walking across the street when a gunman came up behind him and fired, interim Police Chief Brian Dugan said.
"Our officers responded within seconds," Dugan said, noting that enabled officers to quickly set up a perimeter around a roughly square-mile area. SWAT officers assisted by agents from the Federal Bureau of Alcohol, Tobacco, Firearms and Explosives could be seen patrolling the streets with rifles as they moved through yards and banged on doors.
"I believe that this person lives in this neighborhood," Dugan added as he spoke with reporters at the scene. "And we need everyone's cooperation; we need everyone to pay attention to what's been going on."
Dugan said that until his detectives can determine otherwise, Felton's shooting will be treated as if it's related to last month's 10-day spree where three people were slain. The previous three victims were alone and had gotten off a bus in the neighborhood when they were gunned downed at night. None was robbed.
"This has got to stop," Mayor Bob Buckhorn told a news conference on Tuesday. "We will hunt this person down until we find him."
Cynthia Murray told The Tampa Bay Times that Felton had been living with her near the shooting scene. She said Felton was an unemployed construction worker who volunteered Tuesdays and Fridays at the nearby food bank run by a church, which is close to where he was shot. She said he would go to the church at 2:30 a.m. to help.
"He didn't need to come here every week but he loved it," she said about Felton's volunteer work. She said Felton and his twin brother, Reggie, were well known in the area.
"He was the sweetest person, never any problems," his cousin, Linda Daniels, told the newspaper.
Dugan urged Seminole Heights residents to stay inside and prepare to share with police any potential detail that might be useful as the SWAT team and police dogs cleared properties. Police said the suspect is a thin black man, about 6-feet tall, wearing black clothing and carrying a large handgun. They are asking residents to examine video from any security cameras they have.
Seminole Heights is a working-class neighborhood northeast of downtown Tampa that's slowly becoming gentrified. Run-down homes sit next to renovated, historic bungalows, and trendy restaurants have sprung up near auto body shops. Officers were at every street corner around the perimeter, questioning anyone trying to leave.
Robert Clark told the Times he was in a nearby Laundromat with his girlfriend when he heard five shots, turned and saw a man run past. He said he went outside and saw Felton's body.
After the earlier shootings, police increased patrols in the neighborhood and released surveillance videos of a hooded suspect. In a security video taken moments after 22-year-old Benjamin Mitchell became the first victim on Oct. 9, the suspect is running from the scene.
Two days after Mitchell was shot, Monica Hoffa, 32, was gunned down. And on Oct. 19, Anthony Naiboa, 20, was shot after taking the wrong bus home from his new job. Police patrolling nearby heard the gunshots and rushed to the scene to find Naiboa dead.
Jamie Rivera, 40, took his two children to school Tuesday and saw the heavy police presence. He turned on the radio and heard about the neighborhood's fourth killing.
"We're all panicking," said Rivera, a carpenter. "It's kind of scary because they don't have any idea who's doing it."
Rivera has changed the routine of his two children, ages 9 and 11, and no longer lets them play outside.
"This was a very decent neighborhood until the last couple of months," sighed Sherry Street, a 50-year-old cook who has lived in Seminole Heights for seven years. "Up until recently I used to accidentally fall asleep with the door unlocked."
He had to go to a neighboring auto store for some parts Tuesday morning, and said he was headed to work. Otherwise, he said, he plans on staying inside.
Casimar Naiboa, Anthony Naiboa's father, told the Times that Felton's slaying "is like salt in the wound"
"It brings back dark memories," said Naiboa, 50. "I still dream about my son."
Police have told him they hope the killer makes a mistake.
"But every time he makes a mistake, someone loses their life," Naiboa said.

Police used surveillance video to identify the suspect as 47-year-old Scott Ostrem. Television footage showed officers taking him into custody about 5 miles (8 kilometers) away from the Walmart after pulling over his car.
The shooting appears random and there are no indications that it was an act of terror, Thornton police spokesman Victor Avila said Wednesday night.
The motive was unknown, Avila said.
Two men died inside the Walmart, which is about 10 miles (16 kilometers) north of Denver in a busy shopping center. The woman died later at a hospital.
Authorities did not immediately release any other information about the victims.
Aaron Stephens, 44, was in the self-checkout line when he heard a single shot followed by two more bursts of gunfire before people started running for the exits.
"The employees started screaming. Customers were screaming. They were running like crazy, and I ran out too because I didn't want to get killed," he said.
Guadalupe Perez was inside the store with her young son when she heard what she thought was a balloon popping. A Walmart employee told her someone was shooting, and then Perez saw people running away yelling, "Let's go. Let's go. Leave the groceries."
"You see all these things in the news and you go through it, it's scary," she said. "But thank God we're OK and nothing happened to us."
Investigators, including special agents with the Bureau of Alcohol, Tobacco, Firearms and Explosives, were reviewing security video and interviewing witnesses.
Ragan Dickens, a Walmart spokesman, said the company is working with investigators.