For now, investigators say it's too early to say if they are, but they're not ruling it out.
The latest victim is 44-year-old Wanda Rose Spence whose body was found wrapped in plastic in a wooded area along Old Oxford Highway earlier this week.
Search warrants in the case reveal detectives suspect Spence was murdered somewhere else and then dumped where her body was discovered.
The warrants also say Spence was prostituting herself to support a drug habit.
Detectives are following up leads in the case.
"We've gotten calls from as far away as Fayetteville offering information and people who were in that area who saw suspicious cars out in the county," explained Lt. Stan Harris with the Durham County Sheriff's Office.
Deputies say the medical examiner had to bring in a specialist to re-examine her body - but they wouldn't elaborate.
They're also looking into any potential links to other unsolved brutal murders within about a three and a half mile radius.
The body of Crystal Lynn Baker, 24, was found dumped near Chandler and Ross Roads back in January. She was beaten and stabbed 36 times. Court records show numerous drug charges dating back several years.
Then in February, a man and woman were found stabbed to death at a home on Lynn Road and Holloway Street.
The sheriff's office is even looking as far back as 2005 - when 32-year-old Michelle Royall was found shot to death - also on Chandler Road.
Police say she too was soliciting for prostitution.
Now, the sheriff's office and police department are comparing notes.
"We have made arrangements to get together and we're looking into several cases, deeper," said Harris.
They say they can't rule out a serial killer.
"I can't say we hadn't thought about that. But we're going to take a real good look at that in the next couple of days," said Harris. "We're just information sharing and if it adds up, it adds up. If it doesn't, then we'll call it what it is."