I was standing in a shopping mall last year waiting for a family member when I noticed a person walking towards/past me in dark muted colors wearing a backpack

I was standing in a shopping mall last year waiting for a family member when I noticed a person walking towards/past me in dark muted colors wearing a backpack in the same colors across their chest carrying a laptop and a large phone/tablet. They were clearly working and doing some kind of scan of the mall. Unfortunately I didn't notice soon enough to take their picture or chat with them. Would have been nice to know what they were doing.