http://www.ksat.com/news/EXCLUSIVE-KSAT ... index.html
I think KSAT12 is giving these people what they want, attention.
On Friday, a man identifying himself as Raul Gonzelez contacted KSAT 12, claiming to have made those threatening phone calls. He said he wanted to explain what happened and why he made those calls.
He said he and his friends had been drinking and "we really had nothing to do so we decided to chill out and do something funny.
"I told them that there was a bomb, which was made of ammonium nitrate, that was in the parking garage and I told them we were going to blow that up. I told them we had left our bombs inside three cars," Gonzelez said.
During the conversation, Gonzelez said his friends planted chemicals on three cars in the parking garage so bomb-detecting dogs would find them. He said there were no bombs.