Michael Range, who lives near the Fowlers, said he heard about Leila's deadly stabbing from a boy who lives nearby.
"I took my kids instantly and locked the doors," he said. "It was scary. We've been inside all weekend."
Ryan Wydner, who lives across the street from the Fowlers, said the girl's death left him feeling anxious.
"Anything's really possible at this point," he said. "What's the difference between that guy going left and right and coming into my house? I don't know."
While authorities said they had "no specific suspect," they are looking for a white or Hispanic male with a muscular build, about 6 feet tall, wearing a black long-sleeved shirt and blue pants. He is considered to be armed and dangerous, the Sheriff's Office said.
Macedo said the boy who found his sister "is not a suspect at this time, but we are continuing to talk to him, which would be normal because he was the last person with the child."
Detectives continue to track down dozens of leads phoned into a tip line created Saturday, including some leading to other counties, he said.
More than 100 members of the law enforcement community are working on this case, Macedo said.