Previous arrest booking photo of Brandon Miller.
Tampa, Florida -- Tampa police say they now know who the fourth suspect is in last week's beating of Sgt. Johnny Aparicio in South Tampa. But they're asking for the public's help to try and find him.
Investigators identified the suspect as 18-year-old Brandon Miller.
Photo Gallery: Soldier beaten and robbed in South Tampa
Police say it's taken longer to find Lewis than the first three suspects. The most likely reason, says Tampa Police Spokeperson Janelle McGregor, is because "Anyone that has information that the police are looking for them, always makes it a little more difficult for the officers to find them."
"He doesn't live here," said a woman at Miller's address in Carollwood.
A neighbor says the woman who answered the door is likely Miller's grandmother, and that a younger woman who then spoke with us briefly at the same address was likely his mother.
Rather than say if she knew where Miller could be found, the second woman asked about Sgt. Aparicio's condition, and then seemed to make shocking allegations.
"Do you know why that gentleman was transferred to Tampa? He's not the soldier everyone thinks he is," she said.
While unwilling to identify herself, she then attempted to deflect suspicion onto the victim.
"What was he doing out there at three in the morning?" she asked.
Police answer that question by saying Sgt. Aparicio's car had broken down and he was walking home when he was attacked at around 3:20 a.m. May 13th.
While Tampa police are just now turning to the public for help in finding Miller, they may have suspected his involvement for at least the past couple of days. People who live in Miller's Carrollwood neighborhood say the police have been around asking questions.
"They showed me a picture, but I don't remember," said Augusto Corniel, a neighbor from a few houses away.
Corniel told investigators that he mostly keeps to himself and couldn't recall the last time he'd seen Miller.
But neighbor Sandy Nonnenberg says she told police she'd seen Miller parked in front of the house within the past three weeks.
"I seen him with another young boy, that they were around the house sitting out front for a little bit," she said.
Tampa police say in the surveillance video, Miller is the suspect in all light clothing. He's the second to run up to Sgt. Aparicio, they say, and the last to kick him in the face.
Miller's alleged accomplices, Geroshe Lewis, Lerome Howard, and Jared Richardson -- all 18 years old as well -- have all been arrested and charged with aggravated battery and robbery.
When Miller is found police say he will face the same.
"We are confident that this suspect is nearby, and that someone has information," said McGregor.
Police say Miller has a prior arrest record that includes robbery, possession of marijuana and possession of a firearm.
If you know where he is, you're asked to contact Tampa police at 813-394-9053.