In 1994 Dana Sue Gray killed three elderly women and stole their credit cards and went on massive shopping sprees with said cards. She told police she murdered the women to fund her need to shop.

Texting during a movie is never really a good idea, and things escalated in 2014 when Curtis Reeves was at a movie theatre and Chad Oulson, who was sitting in front of him, started texting. Reeves asked Oulson to stop but Oulson refused, stating that he was texting his daughter’s babysitter. They began to fight and Oulson threw a bag of popcorn at Reeves, who then pulled out a shotgun and shot Oulson, killing him and injuring Oulson’s wife.

Candace Brito and Vanesa Zavala killed Kim Pham, who was only 23, after she accidentally walked in front of the camera as the two girls were taking a photo at the Crosby Club in Santa Ana, California. Brito and Zavala beat the young girl to death including a fatal kick to the temple area of Pham, and they were convicted of felony manslaughter.

After his mother refused to buy him tickets to an Avril Lavigne concert, 39-year-old Robert Lyons hit his 61-year-old mother with a cognac bottle. After striking her, he stabbed her and poured chemicals all over her body. Lyons was sentenced to 40 years in prison for his actions.

Jessica Kumala Wongso laced was friends with Wayan Mirna Salihin but laced her iced coffee with cyanide in 2016 because Salihin encouraged Wongso to break up with her boyfriend because she didn’t think the relationship was healthy. Wongso was sentenced to 20 years in prison.

Brenda Spencer killed two people in 1979 when she fired on San Diego’s Grover Cleveland Elementary School with a rifle from her family’s house across the street. When asked by a reporter why she did it, the 16-year-old allegedly told him “I don’t like Mondays.” Her comments inspired the song, I Don’t Like Mondays by The Boomtown Rats.

Raul Rodriguez shot his neighbor, Kelly Donaher, and two other guests when Donaher was throwing a birthday party for his wife and Rodriguez got annoyed because the music was too loud.

Marvin “Buddy” Potter shot Billy Clay Payne, Jr. and Billie Jean Hayworth after they deleted his daughter from their “Friends” list on Facebook.

For siblings, fighting over the television remote is a pretty routine thing except when it goes to another level. In Siberia, a 13-year-old boy allegedly shot his 17-year-old sister in the face after fighting over the remote.

Saying your “please” and “thank yous” is polite in any culture, and for Fergus Glen it’s extremely important. Glen allegedly killed his brother Craig when Craig didn’t say thank you for the meal that his brother cooked him. Fergus grabbed an ax and hacked his sibling to pieces after the meal, and then told authorities, “He annoyed me.”

John Hinckley Jr., notorious for trying to assassinate President Ronald Reagan in 1981 when he shot the president in his chest, was impressed with Jodie Foster and claimed he tried to kill Reagan to impress her.

Tonda Lynn Ansley shot her landlady in the head and then claimed that her landlady was part of a conspiracy to brainwash and kill her. Ansley told the court she was sucked into an alternate reality, and thus was found not guilty because they deemed her not sane. Since then, the Matrix defense has become a form of insanity plea used during murder trials.