Marco Island in Florida is. There are no other islands named Marco.
The address of the Marco Island Branch Library is: 210 South Heathwood Dr., Marco Island, 34145 5000
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The address of the Marco Island Discovery Center Inc is: 970 Cape Marco Dr Apt 1706, Marco Island, FL 34145-6659
The address of the Marco Island Historical Society Inc is: Po Box 2282, Marco Island, FL 34146-2282
The phone number of the Marco Island Branch Library is: 239-394-3272.
The phone number of the Marco Island Historical Museum is: 239-642-1440.
The web address of the Marco Island Historical Museum is: http://www.colliermuseums.com/home.php
The airport code for Marco Island Airport is MRK.
Marco Island, Florida, is in area code 239.
I just searched Wikipedia for both Marco Island - and Murder Island. The Marco Island makes no reference to Murder Island and the search on Murder Island returned no results !
Marco Island is located in Collier Country, Florida, United States. James Harvey Doxsee Sr. had been the mayor of Marco Island, Collier Country.