![Radio transmission shows what first responders knew as gunman opened fire at Buffalo supermarket](https://cdn.cnn.com/cnnnext/dam/assets/220515141910-first-responders-buffalo-shooting-restricted-super-tease.jpg)
Radio transmission shows what first responders knew as gunman opened fire at Buffalo supermarket
CNN
Recorded emergency radio transmissions of first responders in Buffalo on Saturday afternoon reveal what they were dealing with in the chaotic first moments of reports of an active shooter at the Tops Friendly Markets store.
Authorities now believe 18-year-old Payton Gendron allegedly wrote a White supremacist manifesto before traveling from hours away to a predominantly Black neighborhood in Buffalo, killing 10 people and wounding three.
Gendron pleaded not guilty to the first degree murder charge brought against him in court Saturday night, Buffalo City Court Chief Judge Craig Hannah told CNN.
![](/newspic/picid-6252001-20240610110818.jpg)
5 things to know for June 10: European elections, Apple, Hostage rescue, Immigration, Trash balloons
CNN’s 5 Things brings you the news you need to know every morning.
![](/newspic/picid-6252001-20240609153039.jpg)
President Joe Biden warned against a streak of “semi-isolationism” in the US as he stressed the importance of alliances during a symbolic visit to the Aisne-Marne American Cemetery on Sunday, honoring the thousands of Americans who died in World War I at a site former President Donald Trump skipped during a 2018 visit to Paris.