FAIRFAX, Va. (WUSA9) --In a two-hour confession video, the jury heard Julio Blanco Garcia explain what took place the day 19-year-old Vanessa Pham was murdered.

"I was under the influence, I wasn't myself. I'm a good guy," he told the detectives.

Blanco Garcia, who had been picked up from the construction site where he worked, told detectives he was high on PCP the day of June 27, 2010 and couldn't remember much.

Detectives informed Blanco Garcia he was a suspect in the murder of the college freshman because his fingerprints from a previous shoplifting charge matched the prints left behind in Pham's car.

He was then read his Miranda Rights and was told this was his chance to prove that he is not a monster. It was his opportunity to tell his side of the story.

"I remember I was really high, I came to the shopping center and I asked her for a ride."

He said wanted to go to the hospital because he was feeling sick from his high. Garcia said he panicked when he saw Pham make a wrong turn down a one-way street.

"In my mind I thought she was going to do something to me. I don't know what happened. I saw things were going wrong and I grabbed the knife. I'm so sorry," Garcia said while crying.

On Wednesday, the jury also saw surveillance video that showed Pham's activity before she was killed. She is seen entering a shopping center parking lot where she went to go get her eyebrows done at a nail salon.

Another surveillance video showed Garcia entering and exiting a store with his infant daughter minutes before he encountered Pham.

Fairfax County computer forensics detective Jason Friedman told the jury he searched data on the two computers found in Garcia's apartment. After the June 27, 2010 murder, while police had no leads and the mystery dragged on, Friedman says Blanco Garcia Googled his victim's name over and over. He also searched for information about drugs, including PCP.

Blanco Garcia is accused of stabbing and slashing Pham 13 times.

His defense is asking for less than a first-degree murder conviction, alleging that he did not plan to commit murder and was hallucinating on PCP at the time.

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