As Horatio's either going to or coming back from his coffee errand, Speedle sees him going by and shouts from a lab bench, "How he got in!" Horatio is understandably confused, so Speedle explains, "The glitter found on Ruthie is a match to the glitter found on the Zany Town vest. He must have stolen one; that's how he got in." Horatio deduces that it's how the perp got out too. He then goes to call in the stammering manager to see what light he can shed on this phenomenon.
Once the man's in the chair (as it were), he explains away the vest with, "It couldn't have been an employee. Nobody with a record can work there." Horatio moves on and asks how the killer could have had the code to the storage entrance. Bernstein (the manager) says he doesn't know how this happened. Horatio wants to know where the code is kept; Bernstein, demonstrating why he didn't go into a field like national security, admits, "On my desk." As Horatio points out, "In plain view for everyone to see -- that's using your head."
Speedle's moved on from the glitter and found something else interesting in the dirt from the prints: Papilio aristodemus ponceanus, also known as the swallowtail butterfly, and torchwood. Calleigh pipes up, "[This] book says swallowtail's a rare butterfly. Only three have been spotted in Biscayne National Park in the last four years." Yup -- according to the Nature Conservancy, the subspecies ponceanus is imperiled globally, although as a whole, P. aristodemus is apparently secure. Horatio grabs a map so he can begin tracing location based on the eggs. Just then, Megan and her cleavage come in to share the news about Stewart Otis -- "registered pedophile, long record [beat] starting at age twelve." Horatio realizes that all they need is an address. Sadly, it would appear that Stewart's in violation of Megan's Law and has not registered his domicile as required by law. Horatio points out, "If he changed his prints, there's a chance he changed his name, so let's do a property search for the name Otis anywhere in or around Biscayne National Park." That works -- William and Margaret Otis live at 2430 Black Creek Rd., Miami, FL. 33165. Horatio notes, "That's a quarter-mile from the park. Let's go."