Tyler shooter had history of assault, violent threats By LISA FALKENBERG Associated Press Police have identified David Hernandez Arroyo Sr., as the man with an assault rifle who opened fire in Tyler's historic town square Thursday killing two people. Maribel Estrada may have heard her ex-husband's threats of violence in recent days, but acquaintances said she had little time to worry about them. After the divorce last year, the 41-year-old single mother of three received no child support. She worked trimming steaks at a local meat-packing plant to support her family. She took her children's father to court Thursday, hoping...