A former swim coach in Henrietta is accused of sending naked photos to someone he thought was a teenage girl. Matthew Lincoln is charged with attempting to engage in sexual activity with a child. Investigators say Lincoln sent sexual messages and graphic photos to undercover agents posing as a 16-year-old girl. According to investigators, an 11-year-old girl tipped off police after they say she received sexual messages from Lincoln. He was the head coach and program director of the Golden Comets in Henrietta. It's a private swim club and is not affiliated with the school district. Police are concerned there could be more victims.