Below is a list of The Prisoner UNSC Audio Logs and where you can find them in Halo Infinite.
01 Not My Fault
This audio log can be obtained during the Foundation Mission. Near the end of the level, you’ll need to find a power seed to power up the elevator to reach the surface. The audio log can be found to the left of the power seed on the ground in the room with the Forerunner containers.
02 What was Inside
This audio log can be found leaning against a metal support beam on the second level after entering The Tower.
03 She was Smiling
This log is located in the mining laser at the end of the hallway west of the mining controls.
04 Easy to Break
This log can be found southwest of FOB Delta on the west side of the Forerunner structure next to a destroyed Warthog.
05 Barely Anything Left
This log is found during the Nexus mission when you’re looking for the 3 power crucibles to power the grav lift. Head through the middle door (when facing it, the red door will be behind you) to find the log on the left side of the room next to a UNSC duffle bag.
06 Price Paid
This log is found during the Repository mission. Proceed forward until you reach a large room where you learn the truth of the Weapon. After the cutscene, follow the path left until you end up in a storage room. The log is located on the table in this room next to a hologram of Zeta Halo.
07 42410-02214-LB
This log is found during the House of Reckoning mission. Work your way through the area until you reach the mock battle arena. The log can be found on the road to the right of the UNSC building on a crate just past the Warthog.