The George Zimmerman investigation was hijacked "in a number of ways" by outside forces, said the former police chief of Sanford, Florida.

Bill Lee, who testified Monday in Zimmerman's second-degree murder trial, told CNN's George Howell in an exclusive interview that he felt pressure from city officials to arrest Zimmerman to placate the public rather than as a matter of justice.

"It was (relayed) to me that they just wanted an arrest. They didn't care if it got dismissed later," he said. "You don't do that."....