A former University of Nebraska-Lincoln student is facing federal criminal charges because prosecutors say he hacked into a database of more than 650,000 student, alumni and employee records last spring.

The Lincoln Journal Star reports that 22-year-old Daniel Stratman made his initial court appearance last week.

Prosecutors say Stratman, who was studying computer science and math, accessed a protected computer without permission. The database that was broken into held records from the University of Nebraska’s campuses and the Nebraska State College System.

Officials have said they don’t believe any of the sensitive information in the database was downloaded.

Stratman’s attorney, Bob Creager, declined to comment. Stratman faces up to 10 years in prison and a $250,000 fine if he is convicted.