/ Updated By Kerry Sanders, Tracy Connor and Kalhan Rosenblatt 
 
 TAMPA, Fla. — A Florida man walking to church to feed the homeless is believed to have become the fourth victim of a serial killer shooting people at random in Tampa. The Tampa Police Department's interim chief, Brian Dugan, said that police believed the suspect was still in the neighborhood and that officers had knocked on approximately 1,900 doors in addition to deploying K-9 units and helicopter searches. "I’ve been watching the serial killer news — watching, listening, praying — and for that to happen to my brother, to be shot four times at close range, that’s hard," Cunningham said. "We need folks to think about everything they heard last night and everything they saw this morning," Tampa Mayor Bob Buckhorn said during a news conference Tuesday morning. Courtesy of Reginald Felton 
 
 Related: Tampa Police Releases New Video in Hunt for Clues Related to Possible Serial Killings 
 
 Reggie Felton, 60, and Cunningham said they don't hate the person who shot their brother, but hope the person turns themselves in. So you can see what color pants the individual is wearing, and make out the color of the hoodie they are wearing. RELATED: Sister warned latest shooting victim to be careful traveling Seminole Heights 
 
 Robert Clark, who was doing laundry at a laundromat near the shooting scene, told the Tampa Bay Times he heard the gunfire, turned and saw a man running east. I see a man lying in that street and another running to that road. Signs at the laundromat say it has video recorders. "They locked down the neighborhood immediately, and so they hope they have created a giant box around where shooter was and believe he is somewhere in there. RELATED: Arrests spike as police blanket Seminole Heights in wake of three killings 
 
 The suspect "hasn’t gone very far, and we’re talking to as many people as we can to see what they may have seen," said police spokesman Steve Hegarty. Police and were going door to door Tuesday morning along a perimeter stretching from Osborne Avenue north to Hillsborough Avenue, and Nebraska Avenue east to 15th Street. "I’m just not allowed back in until they are done," Skiles said.  Published on Oct 26, 2017 
 
 Tampa Police released additional footage of an individual who was seen walking on a street very close to the first homicide around the time that Benjamin Mitchell was shot on Monday, Oct. 9. Monica Hoffa, 32, was found dead Oct. 13 in an empty lot less than half a mile away. Police heard a gunshot Oct. 19 and found the body of Anthony Naiboa, 20, a few blocks from the first killing. He worked much of his life in construction in Tampa but was not working lately, volunteering Tuesdays and Fridays with a food bank at the New Season Apostolic Ministries, Murray said. "If you own a firearm of any type, we need you to verify that it’s where it needs to be," he said. I’ve been on this block a long time and I’ve never seen anything like this. (1:16 mark) 
 
 Now you see what appears to be the same individual, but it’s in color. "Anybody who knows Tampa knows the twins and they know if you ask (Ronnie) for help he would do whatever you wanted," she said. "We need to catch this killer before we have to notify one more family that their loved one is dead." Felton was looking forward to helping at the food bank Tuesday because his brother Reggie was off work and planned to join him, Murray said. Courtesy James Felton 
 
 Ronald Felton spoke to his twin brother, Reggie, on the phone Tuesday morning about half an hour before the shooting took place. The news and stories that matter, delivered weekday mornings.
– After nearly a month of quiet, an apparent serial killer appears to have struck again in Tampa, Fla. Police in the Seminole Heights neighborhood say a gunman fatally shot 60-year-old Ronald Felton as he crossed a street about 5am Tuesday, reports the Tampa Bay Times. Felton was killed in the same area as three other apparently random victims in separate incidents in October. "We've had another one," said Brian Dugan, chief of Tampa's police force. "We will hunt this person down until we find them," added Mayor Bob Buckhorn. Police previously released a video of a suspect, and this time they also have a description from a witness who saw him running from the scene, per WFLA: a black male about 6 feet tall, with a thin build and light complexion. He was dressed in all-black clothing and carrying a large pistol. "We think by their proximity and the manner it was done, they are linked," said Dugan. "We're saying it's related to the other Seminole Heights murders." Police think the killer lives in the Seminole Heights neighborhood and are asking residents not only to be cautious but to help identify him. Felton, an unemployed construction worker, is believed to have been on his way to a local church food bank, where he volunteered, reports NBC News. The previous victims—Benjamin Mitchell, 22, Monica Hoffa, 32, and Anthony Naiboa, 20—were shot on Oct. 9, 13, and 19, respectively. Felton was killed just blocks from a memorial to the first three victims. (The way the suspect flips a cellphone while walking may be a clue, say police.)