DALLAS (CBSDFW.COM) — A Rowlett man pleaded guilty to two federal violent crime charges after he cyberstalked his ex-girlfriend and shot and stabbed her to death during a bitter custody dispute.Andrew Charles Beard, now 35, was charged with cyberstalking using a dangerous weapon resulting in death and with discharging a firearm during a crime of violence. On Wednesday, June 23, 2022, he pleaded guilty in front of U.S. District Judge Jan J. Boyle.According to plea papers, Beard admitted to cyberstalking and murdering his ex-girlfriend Alyssa Burkett, 24, in an attempt to gain custody over their daughter.On October 2, 2020, Beard placed...