Mar 14, 2014 02:20 PM EDT By Jaleesa Baulkman, UniversityHerald Reporter

Did you know you can go to jail for not wanting to work really hard? 

A Purdue University graduate was sentenced to 90 days in jail for hacking the school's computer system and changing grades, because he didn't want to work hard, Campus Reform reported.

The former student, 25-year-old Roy Sun, was sentenced last week to a four-year sentence - most of which will be served  on supervised probation - for breaking into the University's university system to make himself a straight-A student and fix the grades of other students.

The plot began after Sun successfully altered a single grade in 2008.  When the change went unnoticed, Sun became emboldened and enlisted fellow student Mitsutoashi Shirasaki, The New York Daily News reported.

 "When I came back in 2009, I felt really arrogant. I thought I was untouchable," Sun said during his sentencing last week, according to the Journal and Courier. "It became so much easier to change my grades than going to class and working real hard."

According to The New York Daily News, Sun was a no-show to all of his classes but still received perfect grades during his senior year at Purdue University.

To carry out the ploy, Sun and Shirasaki installed keystroke logging devices on professors' computers and changed grades remotely. A third student, Sujay Sharma, served as a lookout for the two.

When the scam came to light, Sun lost his bachelor's degree from the Purdue University and was expelled from his graduate program at Boston University. Sun also He also lost his $70,000 salary job and now works as a busboy, Campus Reform reported.

"The most troubling thing about this is how brilliant you are and how capable you are to devise this and carry it out. ... I worry about people who are as bright as you who are as dishonest as you because you can do more damage," Judge Thomas Busch said prior to Sun's sentencing, according to Campus Reform.

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