When Grace apologizes to Pete for ignoring him and suspecting he's the killer, the computer screen can be seen in the background, on, but at one point begins to fade into sleep mode. The camera cuts to Grace and when it cuts back to Pete the computer is suddenly on again.
When they are showing Mandy Greenwell's transcripts, it shows her as having 118 credits (2 credits short of the 120 required for graduation). However, it shows her as having earned 30 the first year (5 classes, 6 credits per class), 30 the second year, 30 the third year, but the fourth year shows four classes with 6 credits, and one class with 2 credits. That would add up to 116 credits, not 118.
Additionally, it lists the final class as 2 credits, but with an "incomplete" for the grade. That would suggest that the course was only worth 2 credits total but she wouldn't have earned any credits for an incomplete (colleges don't award partial credit for an incomplete). If that was the case, her credit total would be 114, and she wouldn't have been qualified to graduate even if she had completed that course.
Additionally, it lists the final class as 2 credits, but with an "incomplete" for the grade. That would suggest that the course was only worth 2 credits total but she wouldn't have earned any credits for an incomplete (colleges don't award partial credit for an incomplete). If that was the case, her credit total would be 114, and she wouldn't have been qualified to graduate even if she had completed that course.