From the Presidential Medal of Freedom site's
timeline of Cesar Chavez's life:
On January 25th, outside the Talisman Sugar Plant near Belle Glade, Florida, Nan Freeman was killed in the second week of a UFW picket. Despite repeated complaints to local police of harassment from truck drivers, Ms. Freeman, an 18-year-old college student, was knocked unconscious when a trailer load of cans knocked her against a guard railing. Click here to read Cesar Chavez's statement on Ms. Freeman's death.The embedded link is empty. This link goes to a UCLA page with a bio of Freeman, and Chavez' statement.