In addition to reviewing social media posts, federal agents have interviewed family members and associates of Garcia to ask about his ideological beliefs, the official said. Investigators are also reviewing financial records, other online posts they believe Garcia made and other electronic media, according to the official.
Two law enforcement officials said investigators also searched a Dallas home connected to the suspect. The officials spoke on condition of anonymity in order to discuss details of an ongoing investigation.A woman who lives three houses down from the low brick house said she saw a large group of uniformed officers go into the home Saturday between 6 p.m. and 7 p.m.
The woman said she did not know her neighbors well, but knew them to be "very polite, very nice people." She said the man she now understands to have been the shooter was always friendly and would wave or honk his horn as he came and went. This year has seen an average of about one mass killing per week, according to a database maintained by The Associated Press and USA Today in partnership with Northeastern University.
"Some of our people were there. Some perhaps in this room. Some of our students were working in those stores and will be changed forever by this," Caton said.