TAMPA (970 WFLA) -- Detectives investigating the Seminole Heights murders face challenges that aren't present in cases where the victim and suspect knew each other.
Retired police officer Jim Diamond has more than four decades experience in law enforcement, and currently works as a security consultant. He says that unless the shooter starts talking, detectives will need people in the neighborhood to say something, when they see something unusual.
"If it's unusual, if it's unique, if it's repetitive, if it's strange, (residents) need to make note, and they need to notify police," according to Diamond.
Diamond says because the attacker is shooting victims at a distance rather than killing them at close range through some other method, physical evidence is nonexistent.
Diamond says without clues from the public, detectives need the suspect "running off at the mouth or ... bragging to someone" or having an associate who does the same.
There is surveillance video of a person of interest in the Seminole Heights murder cases... although it doesn't show the face of a potential attacker. Diamond says that other aspects of the video could reveal the assailant, to friends or family. "Frequently, people can recognize someone they're familiar with, by their walk, by their gait, or by their mannerisms," Diamond said.
"If it walks like a duck and talks like a duck and hangs around with ducks, it might be a duck," Diamond says.