We use language casually. I suspect we always have, but if it appeals to you for me to say we use it more casually now in an era of constant news and Twittering, I'll at least say that a crush of imprecise language can probably warp our collective understanding of events.
In Charlottesville, Virginia on Saturday, 32-year-old Heather Heyer was murdered by a 20-year-old named James Field Jr., who used his car as a weapon. He injured 18 other people in the attack.