Start on the roof, to the South of the collectible. Select the Remote Controlled Batarang from the inventory and aim it at the ventilation shaft shown in the screenshot. Throw the batarangs, decrease its flight speed and prevent it from being destroyed. After the batarang flies out of the venting shaft, direct it towards the green button. You can now collect the Datapack from the box that you have just opened.
Datapack 9 (Lacey Towers)
This collectible is in the Lacey Towers, which you visit for the first time while completing the Solve the crime scene inside Lacey Towers main mission. By way of reminder, to make it into the building, you need to reach the small balcony shown in the above screenshot.
After you get there, go to the apartment belonging to Sionis, which is currently the crime scene [Sionis' Safehouse]. The Datapack is behind the radiator in one of the weakly-lit parts of the Eastern part of the apartment.
Datapack 10 (My Alibi Nightclub)
You visit the My Alibi Nightclub among others, during the side mission connected with Bird, but you can go there anytime throughout the game. You need to reach the Dance Floor, and go to the dressing room through the South-Western door. Locate the venting shaft grate here, rip it off using the claw and jump inside. You will find the Datapack while squeezing through the shaft.
For finding all 10 Datapacks, you receive the audio file connected with Commissioner Loeb.