ST. CHARLES COUNTY — A St. Charles County jury on Wednesday convicted Christopher Harper of murdering his girlfriend's brother and shooting two others inside a St. Peters home in May 2023.

Harper, who lives in St. Louis, broke into a home in the 1600 block of Country Acres Drive and then fatally shot 57-year-old Darin Gosejohan and injured Gosejohan's 45-year-old wife and teen daughter.

Court documents say the home's security camera showed a large figure walk up the stairs around 1:40 a.m. on May 22, 2023.

The figure — later identified as Harper — then ordered the 13-year-old girl to go down the stairs as he held his phone with a flashlight in one hand and a small revolver in the other as he walked back downstairs to Gosejohan's room.

The security system captured the sounds of yellin

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