The Ingham County Sheriff's Office is asking for the community's help in identifying the man, or men, in sketches released Thursday.
"If they know something, we want to hear about it," says Ingham county sheriff Gene Wriggelsworth.
Sheriff Wriggelsworth says more than a month after the investigation began, the office has mostly run into a wall.
"We've exhuasted most of our leads in this investigation," he says.
Which makes people like Janelle Henley-Wild, who works with the Holt Heritage Village Apartments, feel a little uneasy.
"There's still a murderer out there, so you do worry about that a little bit," claims Henley-Wild.
She also says most of the people living at the apartments are starting to see the nerves calm down:
"Ultimately in maybe understanding that it was an isolated incident, that we feel secure, and we're a secure building as well, so I think those fears have started to go away."
Over the course of the investigation, detectives have been able to confirm that it was an isolated incident.
Detective sergeant Greg Harris says "we have no indication for the community in general to be concerned."
Police say they believe the suspect was spending time with Fluke for at least a week after they had possibly met online.
"The investigation has lead us down the path of the victim, Mr. Fluke, had been seeking male companionship through different social media outlets," explains Harris.
That has detectives talking to people at gay bars, homeless shelters, and on street corners.
"We are reaching out to everybody. All aspects of our community."
Now, investigators hope the community will be able to help identify the suspect.
The sheriff's office says the suspect is likely between 5'8" and 6" tall, with short blonde hair and a pale complexion. He may be a crossdresser and could be wearing a shoulder-length blonde wig. Investigators believe he may be driving a black Pontiac.
If you have any information about the suspect, call the Ingham County Sheriff's Office at 517-676-2431.
There is a $1000 reward in the case.