Taylor Casey’s family believes Bahamas police are not doing enough to find her

Family and friends of a Chicago woman who disappeared during a yoga retreat in the Bahamas are not satisfied with authorities’ efforts to find her.

In conversation with NBC Today, Taylor Casey’s mother expressed her frustration with the way the investigation was handled by the Bahamian police.

“They have to act on the island as if it is their child who is missing,” said Colette Seymore Today.

Casey, 41, was last seen in the Paradise Island area on June 19, the Royal Bahamas Police Force said in a statement June 21. Casey was attending a certification retreat hosted by the Sivananda Ashram Yoga Retreat Bahamas. The organization told PEOPLE it first reported Casey’s disappearance to authorities.

On July 2 Police said Casey’s cell phone and other belongings were found in “nearby waters,” but not her passport.

“Let me make this clear to the U.S. media, the public and our government officials: We are not satisfied with how this investigation has been handled to date,” Casey’s friend Emily Williams, who traveled to the Bahamas with Seymore after the disappearance, said in a statement. “And what we have learned and observed during our meetings with authorities and ashram leaders is disturbing and infuriating.”

According to NBC, Casey’s family claimed that after her disappearance, police left the tent where Casey was staying open to the public instead of immediately treating it as a possible crime scene.

NBC reported that Casey’s family believes she may have been the victim of the attack, but authorities have not commented on that possibility.

Chrislyn Skippings, head of the Royal Bahamas Police Force, praised the investigative efforts in a televised statement, footage of which was shown by NBC.

“We used our drone technology, we used our dogs, we used our divers,” Skippings said.

Skippings did not respond to PEOPLE’s request for comment.

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In January, the U.S. State Department issued a Level 2 travel warning for the Bahamas, urging visitors to “exercise increased caution” due to rising crime in the island nation.

On July 1, the Chicago Police Department also issued a missing person report for Casey.

Anyone with information is asked to contact the Royal Bahamas Police Force at 502-9991/2 or Crime Stoppers at 328-TIPS (8477).