Published: Apr 03, 2012 11:34 PM EDT
Updated: Apr 04, 2012 12:04 AM EDT

COLLIER COUNTY, Fla.- The national spotlight is now shining down on the search for answers in the disappearances of two Collier County men, and it's led to at least one new tip.

The Collier County Sheriff's Office confirms they're investigating a possible lead they received Monday night.

Spokeswoman Michelle Batten says the call came just moments after CNN conducted a live over the phone interview with Marco Island Police Chief Don Hunter.

Hunter served as Sheriff during the time Felipe Santos and Terrance Williams disappeared, and reflected on the cases with WINK News Tuesday.

The men, who didn't know each other, went missing at different times.

Santos was reported missing after he was involved in a minor traffic accident in North Naples in October 2003.

Terrance Williams was last seen near a Naples cemetery in January 2004.

A former Collier County Sheriff's deputy, then Corporal Steve Calkins, is believed to be the last person to see both of the men.

"These two are particularly perplexing because of the inconsistencies pertaining to the deputy sheriff, the level of intrigue that is involved because the deputy sheriff appears to have been involved in the disappearance in some fashion," Hunter said.

Chief Hunter said he exhausted every effort to name a suspect or even secure a search warrant in the cases.

"We would suggest to Deputy sheriff calkins that we were concerned for the safety of mr. Santos and Mr. Williams and that we had suspicions about potential harm that may have come to them," Hunter said.

That's when Hunter ordered his team to place a tracking device in Calkin's patrol car with hopes he'd revisit a possible crime scene, but neither that nor a forensic investigation of the vehicle produced any evidence.

During an internal investigation Calkins failed a polygraph test pertaining to contact with Terrance Williams and ultimately refused to cooperate, according to Hunter.

Chief Hunter and investigators at the Collier County Sheriff's Office hope the media attention will help them gather more information.

If you know anything about the disappearances of Felipe Santos or Terrance Williams, call the Collier County Sheriff's Office at 239-252-9300 or Southwest Florida Crime Stoppers at 1-800-780-TIPS.