A 17-year-old faces charges after allegedly cutting his stepfather in the neck following services Sunday at a Cumming church.According to Cumming Police Sgt. Bryan Zimbardi, Christian Alexander Guerndt was charged with aggravated assault following the incident with his stepfather, Ronnie Rapert, at Mercy Fellowship Church. Bond has been set at $11,100. As of Tuesday morning, Guerndt was still in custody at the Forsyth County jail.“There was an argument between the stepdad and [Guerndt] at the church,” Zimbardi said.