When Garcia is showing the pictures of the victims to the team, we see the monitor as she loads the first crime scene picture of a body, then the camera cuts to the team looking at the monitor, and that same picture is loaded again.
At one point when Garcia is searching for widowed fathers with sons who fit the profile, they tell her to search for the homicidal triad. Her screen says "+MCDONALD TRIAD" , but it should say "MACDONALD TRIAD"
When the unsub has Kate Phinney and is cutting her arm, the tip of the knife clearly bends.
This episode is set in San Diego, but the notices posted on a bulletin board include a moving sale in Las Vegas and an alcohol support group meeting in Pittsburgh.
The photo of the unsub that is distributed by BAU is not the same as the one taken from the victims iPhone. In the original, the face was partially obscured and the dice logo wasn't visible on the baseball cap.
When Reid and Morgan are walking up the stairs towards the victim's apartment, they both can be heard speaking but they are not actually speaking. Neither one of their lips are moving.
When Garcia is reading out Laurie's posts to Morgan and Reid, one post is "All alone and scared to cry". However, Garcia reads it as "All alone and too scared to cry".