​​Grief mounts at Frisco’s Memorial High after student’s fatal stabbing ... and more news

Memorial High School is reeling again after a 17-year-old junior was stabbed by another student at a school track meet on Wednesday, dying in his twin brother’s arms. That followed what Frisco police called a possible double murder-suicide in December involving a15-year-old Memorial High School freshman. In other news, Dallas-Fort Worth’s Fortune 500 companies lost $49 billion in market value Thursday by the close of trading. Investors retreated after President Donald Trump announced sweeping tariffs on what he called “Liberation Day” the prior afternoon. In North Texas, hard hit companies such as Caterpillar lost $13.8 billion in value and Texas Instruments devalued $12.7 billion; members of the Texas House Transportation Committee pushed for details about a long-discussed high-speed rail project linking Dallas to Houston, but the company behind the project had few answers to provide lawmakers; and if you are a lover of pickles, The Big Dill is making its Texas debut in Arlington on Nov. 8. Learn more about your ad choices. Visit megaphone.fm/adchoices