I didn’t see in the article what information was falsified.

However, the article goes on to say:

“As part of that process, Green would fill out a file review worksheet and place it with the case file, he testified. The file review worksheet would identify what work had been done on cases and set goals for agents to work toward.

…

In March 2012, when Green was set to conduct his second round of file reviews, he discovered that most of the 100 or so cases were missing the worksheets, which had been there during the first review, he testified.”