TAMPA, Fla. -- Dr. Jack Levin has studied serial killers since the 1980's, written books about them and even interviewed Charles Manson and the Hillside Strangler in prison.
He believes the serial shooter who's killed 4 people in Seminole Heights lives there and may be a teenager or in his early 20's.
"We're talking about a rare serial killer. We don't get too many of them like this,” said Dr. Jack Levin. "This killer distances himself by using a firearm and more younger killers use guns,” he said.
Levin also said he gets a thrill from terrifying the community and ambushing his victims.
"This guy could conceivably change his location for his murders. He could change his victims. He might decide to strike when there's a group of people there. It ups the ante. He may be getting bored, getting away with murder,” said Levin.
The suspect a witness described to Tampa Police is a tall, thin black male, wearing dark clothes, a black ball cap or hoodie and carrying a large, black pistol.
"He'll feel so invincible, so invulnerable, so superior to everyone else that he'll cut corners and it looks to me like he's already cut a corner. There was an eyewitness,” Levin said.
Levin says serial killers can deviate from patterns once they get going and isn't ruling out he may strike in a different neighborhood or time of day.
"He's getting away with murder, having a lot of fun at our expense, getting a big time thrill and that's his motivation and that's why I don't think he's going to stop,” said Levin.