Schools in several Kentucky counties were closed Monday as the FBI and the U.S. Marshal Service joined the manhunt for a gunman suspected of opening fire along Interstate 75 over the weekend, wounding five people. The arrest warrant for the suspect, 32-year-old Joseph Couch, alleges he vowed to "kill a lot of people" in a text message minutes before he shot and wounded five people on Saturday night. Evacuation orders have been issued in parts of Louisiana as Tropical Storm Francine quickly gains strength in the Gulf of Mexico. Francine is expected to become a hurricane before making landfall this week. Lonnie Quinn has the latest. Debate day is one day away and Vice President Kamala Harris and former President Donald Trump deadlocked in a new national poll. Weijia Jiang reports on how the two candidates are getting ready. A CBS News investigation found more than one-third of all top election's officials have quit or retired since the 2020 presidential election. Experts worry the inexperience of new supervisors could lead to mistakes. Stephen Stock has details. Newly released police video from 2023 shows the now 14-year-old accused gunman in the Apalachee High School shooting and his father telling officers they were not a threat. Mark Strassman has more on the warning signs that may have been missed.