In the context of the episode " Starter Home " (Season 14, Episode 2) , the "paper" you are likely referring to is the wallpaper that serves as a central piece of forensic evidence .
: By analyzing the different patterns and ages of the wallpaper layers, the BAU is able to establish a timeline for the murders, which they find date back over 20 years. [S14E2] Starter Home
The BAU investigation centers on the mummified remains of multiple victims found hidden inside the walls of an elderly couple's home in South Carolina. The "paper" in this episode is significant for several reasons: In the context of the episode " Starter