Taylor Casey, 41, was last seen June 19 on Paradise Island. She was in the Bahamas for a yoga retreat.
The suspension of Chief Superintendent and Officer-in-Charge of the Criminal Investigation Department Michael Johnson came late last week due to a "concerning voice note" circulating on social media. Authorities did not specify what was in the voice note.
Another officer, Chief Superintendent Anthon Rahming, will assume the responsibilities of officer-in-charge of the Criminal Investigation Department during the suspension.
This comes after police in the Bahamas gave an update Monday on the recovery of Casey's phone.
They revealed police had found it under 50-plus feet of water, and both Bahamian and U.S. authorities have been unsuccessful in getting information from it.
SEE ALSO: Family of American woman missing from Bahamas yoga retreat speaks out
Police also said Monday that dogs picked up on a scent from the yoga tent during their search, but it ultimately did not lead to anything.
Casey's mother traveled to the retreat after her daughter's disappearance, but said her visit was "deeply unsettling."
"I just felt like they didn't care. They didn't care at all," Colette Seymore said.
The family is calling on the FBI to step in, saying, without their support, they may never know what happened to her.
The video in the player above is from a previous report.