A mother of three was allegedly shot and killed by her ex-boyfriend Saturday morning while she was recording a TikTok video with her friend.

Joshua K. Thompson, 25, was arrested and accused of fatally shooting Kaitlyn Lee, also 25, who heard him banging on the window with a handgun while she was in the kitchen of an apartment in New Albany, Indiana, the Lexington Herald-Leader and WDRB-TV in Louisville, Kentucky, reported, citing a probable cause affidavit.

The TikTok video, reviewed by police in New Albany, a Louisville suburb, showed Lee and her friend laughing, dancing and lip-syncing to a song before a blast can be heard, the affidavit said. Police said smoke could be seen in the video before it ended.

Lees friend told police that Lee asked Thompson, What are you doing here? before he fired through the window, according to the affidavit.

A neighbor who witnessed the shooting told WDRB that she heard a man screaming before police ran into the apartment.

My dad and her grandpa are really good friends. Its such a tragedy to witness all of this, the neighbor told the TV station.

Police said in the affidavit that Thompson called his brother immediately after the shooting and was advised to call 911. Thompson allegedly told dispatchers he shot the mother of his child, the Herald-Leader reported.

During his interview with authorities, Thompson said he went to the apartment that morning to see if Lee had other men over and waited outside for 20 to 30 minutes before looking through the window.