but, how would he deal with the powerful testimony of preston taylor. is a liar. >> his testimony is untruthful, it's false. it's imagined and erroneous. >> and, just how would the defense attorney backup that claim? preston made it easy for him. >> but you don't always tell the truth, isn't that correct? >> i haven't in the past. >> hoping for leniency after he was arrested, preston told police an elaborate and disturbing story about one of his own relatives. >> you made an accusation against somebody, said that you were sexually assaulted by that person. >> right. >> and all those details that you gave, they were all false. they were all false, weren't they? >> correct. >> preston had lied to the police about someone close, and committing a serious crime. >> for diaz-cobo, it was an gift to attack preston's credibility. >> we are talking to somebody who was admitted to making up stories, making false accusations against innocent people. >> defense attorney, diaz-cobo, told jurors that precedent story about liam was alive too. a lie that could save him