Here is a concise summary of the disappearance of Kris Kremers and Lisanne Froon:
**Case Overview**
* Kris Kremers and Lisanne Froon, two Dutch girls, disappeared on April 1, 2014, while hiking the La Pianista trail in Boquete, Panama.
* They were on a trip to celebrate Kris's graduation and had planned to volunteer at a local school.
**Investigation Findings**
* The girls' host family's dog returned without them, prompting a search that was delayed by four days due to police inaction.
* A backpack with personal belongings, including phones and a camera, was found on a riverbank on June 9, 2014.
* Phone records show the girls attempted to call emergency services on the first day of their hike.
* Over 100 photos were found on the camera, with 90+ taken at night, including one image taken 8 days after their disappearance, with an unclear orientation.
* Local residents found Lisanne's shorts, Kris's boot, and bone fragments, including some that were sun-bleached and unidentified.
**Theories and Controversies**
* Official story: Kris fell off a bridge, and Lisanne left to find help, eventually dying due to exhaustion or injury.
* Alternative theory: Possible third-party involvement, supported by:
+ Missing photo (509)
+ Dry, well-packed backpack
+ Unidentified bone fragments
+ Unidentified fingerprints on the backpack
+ Rapid decomposition of bodies
* Similarity to a recent, unsolved murder case in the same region, with an identified teen suspect, raises further questions.
**Case Status**
* The disappearance and deaths of Kris Kremers and Lisanne Froon remain a mystery, with many unanswered questions.
Here are the key facts extracted from the text, without opinions, with each fact numbered and in short sentences:
1. Kris Kremers and Lisanne Froon were two girls from the Netherlands.
2. They arrived in Panama on March 15, 2014, to celebrate Kris's graduation from school.
3. The girls spent two weeks exploring before reaching Boquete on March 29, 2014.
4. They planned to volunteer at a local school and improve their Spanish.
5. The girls were told by the school they arrived a week early and were allegedly met with rudeness.
6. On April 1, 2014, at around 10 a.m., the girls went on a hike up the La Pianista trail with their host family's dog.
7. The dog returned home without the girls a few hours later, prompting the host family to call the police.
8. SINAPROC (Panama's national system of civil protection) took four days to initiate a search for the missing girls.
9. Local residents and tour guides assisted in the search during this delay.
10. A backpack belonging to the girls was found on June 9, 2014, by an Agoby woman on the riverbank of the Serpent River.
11. The backpack contained:
* Two bras
* Two pairs of sunglasses
* A small water bottle
* Lisanne's camera
* Two smartphones
* A passport
* $83
12. Police analyzed the phones' call records and found attempts to call the Dutch and Panamanian emergency lines on April 1, 2014.
13. The girls made intermittent attempts to check for a signal on their phones from April 1 to April 6, 2014.
14. After April 6, multiple incorrect PIN attempts were made on one of the iPhones, with no successful login.
15. Over 100 photos were found on the camera, with:
* Only about 10 taken during the daytime
* 87 taken at late night hours (1:00-4:00 a.m.) showing blackness
* One final image taken on April 8, 2014, with an unclear subject
16. Image 509, which would be between the last daytime and first nighttime images, is missing.
17. Lisanne's shorts were found upstream from the backpack location, reportedly in an eddy near Monkey Bridge.
18. Chris's boot, with her foot still in it, and a fragment of Lisanne's pelvis were found near the shorts.
19. Multiple bone fragments belonging to both girls were discovered, with three fragments remaining unidentified.
20. The official investigation concluded that Kris likely fell off Monkey Bridge, and Lisanne attempted to find help but also died.
21. The case is highly contested due to alleged police mismanagement.
22. A separate, unrelated case in the same region of Panama involved the murder of a girl named Katherine Johanna, with only one teen suspect identified.