The girls sleep in because they had been up late. Libby's father, Derrick, makes them pancakes for breakfast. 
Derrick leaves to go take photos for Becky's business. 
Libby's grandmother, Becky, makes a deal with the girls. She says if the girls help with her filing work, she'll give them some spending money and maybe later on that day she'll take them out shopping to go spend the money they just earned. The girls happily help with Becky's filing. 
Liberty German (14 years old) and Abigail Williams (13 years old) decide to have a sleepover at Liberty’s house knowing that they did not have school the next day (Liberty's grandparents' house). 
There was no school on Monday due to snow days being built into the school schedule but the winter being too mild that year for the snow days to get used. 
The girls do typical sleepover activities and Liberty's older sister Kelsi joins in. Kelsi said they all “had a movie night and ate pizza.” 
A suspicious vehicle is parked at the abandoned CPS/DCS building on the eastside of county road 300 North next to the Hoosier Heartland highway.
The girls ask Liberty’s grandmother Becky if they could go to the Monon High Bridge trail, Becky says yes, but only if they were able to arrange for a ride there and a ride back. 
The trail is considered to be a hangout for local teens their age. The girls were familiar with the Monon Bridge and Libby would often visit the trail with her older sister to take photos. 
The girls then ask Liberty’s older sister Kelsi to drive them.  Kelsi says she can drive them there, but she cannot drive them back because she had plans to go to a friends house and then work. 
Liberty called and asked her dad, Derrick if he could give them a ride back from the trail since Kelsi was unavailable. Derrick agrees to be their ride back from the trail. He said he would pick up them once he was done taking photos for Becky's appraisal business. He estimated that he would be done with this photography work in Frankfurt in 2 hours. 
There was no set time for the girls to return to their meeting point, the plan was that Derrick would call or text them on his drive when he was close to arriving and they would return to the trailhead to be picked up. The approximate time of when they might expect him to be there would be 3:00-3:30pm.
Kelsi picks up girls to take them to the bridge.
Phone records indicate Kelsi's boyfriend calls her at 1: 38 PM. Kelsi remembers already being on the phone with him when she dropped the girls off.  Meaning the drop off could not have been any earlier than 1:38 PM.
Around this time, Libby calls and asks her dad, Derrick if he could give them a ride back.  Derrick agrees to be their ride back from the trail. 
Derrick says he will pick up them once he is done taking photos for Becky's business. 
There was no set time for the girls to be picked up.  Derrick said he would call or text them once he was getting close to arriving and then they'd return to the trail head. 
DROP OFF POINT
Kelsi drops them off at an entrance of Monon High Bridge trail that is across from the Mears' farm, an unofficial parking area. They were not dropped off at the Freedom Bridge parking area.
Kelsi watches the girls walk until they got onto the trail.  Kelsi does not notice anything unusual at the parking area before driving off. 
Abby and Libby start walking down the trail.
CLOSE UP OF THIS
Abby and Libby reach the beginning of the bridge.
Liberty German uploads to Snapchat a picture of the Monon Bridge. 
Libby uploads a picture of Abby walking on the bridge to Snapchat. 
Both of these snaps were posted directly to Libby's story, meaning it was a post that was view able by anyone of Libby's added friends on Snapchat. 
At an unknown time after the two Snapchat uploads Liberty starts taking a video on her cell phone.
Police say the girls mostly talk about "stuff girls talk about" in the recording, but later the girls mention of a man they notice behind them on the bridge. 
Sheriff Leazenby says it appears the girls initially took pictures for fun but later became uncomfortable and recorded the video as precaution. 
In the released video, it is believed that Libby's perspective is from the south eastern side of the bridge, looking backwards towards the north western side of the bridge.
It has been theorized that the offender pulled a weapon or found a way to make the girls comply with his orders.
According an audio snippet from the Libby's video recording
at some point the offender said to them "Guys... Down the hill." The path the girls and offender took after leaving the bridge is unknown. The arrows on map are purely an abstract approximation. They are not intended to be taken literally.
In between the south eastern end of the bridge and the body disposal location there is a shallow section of the creek. This shallow section varies between ankle to knee deep and can be waded through.
"Guys... Down the hill" Offender Audio - Indiana State Police
00:00 / 00:00
Libby's grandmother, Becky has said call records show Derrick called Libby at 3:11pm, intending to tell them that he was getting close and they should start heading back to be picked up. 
As a point of reference Derrick remembers he was just starting to drive over the Wilson Bridge when he makes this 3:11 pm call. 
Derrick pulls into the parking area and does not see the girls.  Derrick calls Liberty’s phone but no one picks up. 
Derrick knows it is not like Liberty to ignore his texts and phone calls, especially when she was expecting him to call. He parks his car and begins walking the trails to search for the girls. 
Derrick reaches the point where the trails intersect and he stops a man dressed in a flannel shirt who is approaching the intersection coming from the 501 trail. 
Derrick asks the man with the flannel shirt “Did you happen to see two girls up there?” and the man replied “No, I did not but there's as couple on the bridge.” 
This man with a flannel shirt later becomes a key witness in this case and he is among the first to give a witness account to law enforcement. Online discussion outlets have nicknamed him "Flannel Shirt Guy", or FSG.
Because Flannel Shirt Guy did not see the girls on the 501 trail, Derrick starts walking the other trail that leads directly to the creek edge, called the 505 trail.