Lost in the Process is a main mission under Kelley Clan in Watch Dogs: Legion.
Your task is to infiltrate the EPC and find Angel Lopez’s whereabouts.
Here’s a walkthrough of Lost In The Process in Watch Dogs: Legion.
Get to the EPC
Go to the marked area on the map.
You can enter the EPC from the front door. You may want to shock the guard first.
Disable the alarm and walk through. Get into the EPC.
Meet the contact
You will then see two more guys on the way in. Distract the person and walk past the guy.
You will see another guy in the reception. Take him down to be safe.
Once you’re inside the EPC, you can walk freely in the general area. Talk to the contact upstairs.
Access the EPC database
He’ll tell you about the database. Take down the guard in front first. Disable the alarm and enter the EPC.
Use the camera to set up a trap to get rid of the first guard inside. After climbing up the stairs, walk towards the right.
You should see a ladder somewhere on the right side. Climb up.
You will then see that the database is inside a locked room. Go to the room beside it and you can download a key from the computer.
Get back to the front door of the database room and it should be unlocked now.
Enter the room to access the database.
Download the AR data
Get back out to the main area of the EPC where everyone is.
Download the clinic’s AR data.
Investigate the AR footage
You will then need to enter the clinic (Carcani Medical) but it’s locked.
Hijack a camera inside and rotate the wiring to make it all blue.
Enter the clinic once it’s unlocked.
Also, activate the AR footage inside. Analyze the footage as well.
Next, follow the reconstructed Lopez out of the clinic and follow him all the way until the reconstruction stops.
The mission ends after finding out whether Lopez escaped.