Sean Crizer was a student at Howard High School in Ellicott City, Maryland. He was the main suspect in the murder of Charlotte Zaremba and attempted murder of her mother, Suzanne Zaremba. ^{[2] [1]}

On January 1, 2017, Crizer shot and killed Charlotte Zaremba at her home in Ellicott City, Maryland in a murder suicide. ^{[2] [1]}

Charlotte Zaremba's parents left their house in the 4800 block of Knoll Glen Road on New Year’s Eve to pick up Charlotte from a party. ^[2]They returned home, and a short time later, Suzanne Zaremba heard a scuffle in her daughter’s bedroom. ^[2]

When she entered the room, she saw Charlotte struggling with a masked suspect, later identified as Sean, and that's when the gunshots were fired. ^{[2] [1]}

Sean fired a shot at Suzanne Zaremba and another at Charlotte Zaremba, fatally wounding her, before turning the gun on himself. ^{[2] [1]}Suzanne Zaremba was treated for her injuries and released from the hospital. ^{[1] [2]}

Sean died on January 3, 2017.

^{[2] [1]}He had burglarized two other homes in the area before his death. ^[2]Police also found a mask and stolen handgun from the shooting. ^{[2] [1]}