

'The Lost Girls, The Bones, and the Man in the Panama Morgue'. 'Deep Inside the Panama 'Paradise' Murder Mysteries'. 'Indígenas han sido pieza clave en investigaciones'. ^ a b 'Dutch girls' camera took 90 photos in 3 hours'.'The Lost Girls of Panama: The Camera, the Jungle, and the Bones'. ^ a b c Visser, Jeremy Kryt|Nadette De ().'The Last Man to See the Lost Girls of Panama Alive'. ^ a b Visser, Jeremy Kryt|Nadette De ().^ 'Hunt for girls missing in Panama scaled down, Dutch men being questioned'.'Lisanne, Kris, Catherine-Will the Panama Cases Ever Be Solved?'. 'Did a Serial Killer Stalk the Lost Girls of Panama?'.

^ a b 'Cronología de la búsqueda de Kris y Lisanne'.'Death on the Serpent River: How the Lost Girls of Panama Disappeared'. ^ 'Missing in Panama - A Mystery Deepens - Mostly Mystery'.^ a b 'Kris & Lisanne likely fell off cliff in Panama: investigators'.On April 11, the phone was turned on at 10:51, and was turned off for the last time at 11:56. One report showed that between 7 and 10 April, there were 77 emergency call attempts with the iPhone. After April 6, multiple attempts of a false PIN code were entered into the iPhone it never received the correct code again. Kremers's iPhone would not make any more calls either but was intermittently turned on to search for reception. After April 5, Froon's phone battery became exhausted after 05:00 and was not used again. None of the calls had gone through due to a lack of reception in the area except for one 911 call attempt on April 3 that lasted for a little over a second before breaking up. The first distress call had been made just hours after beginning their hike: one from Kremers's iPhone at 16:39 and shortly after that, one from Froon's Samsung Galaxy at 16:51.
