On Sunday the word tip was used several times. It has since changed based on interviews by this ranger. MSNBC and FOX both at one time used the term 'tip', but are not using it anymore.
This guy is an expert in the use of "layered voice analysis" which is said to be much better at detecting lies than the standard lie detector test. I don't know if it is admissible in an Aruban court, but it can certainly be used to pressure the suspects.