A graduate student at the University of California, Berkeley, has been killed in Mexico — where his bullet-riddled body was found in his SUV after his fiancée reported him missing on his trip to conduct field research about plants. Gabriel Trujillo, 31, a botanist and fourth-year PhD candidate in the Department of Integrative Biology, was shot seven times June 19 in the northwest state of Sonora and his body was discovered three days later, his family said.