George Zimmerman Trial Update: Prosecutors Say 'Truth About the Murder of Trayvon Martin is Going to Come Directly From His Mouth'

Opening statements in the Travyon Martin murder trial began on Monday and the prosecution wasted no time to paint a negative portrait of George Zimmerman, stating he is a trigger-happy killer who was trying to "rid the neighborhood of anyone that he believed didn't belong."

Zimmerman has pleaded not guilty to second-degree murder in the fatal shooting of Martin on February 26, 2012, in Sanford, Fla.

"The truth about the murder of [Martin] is going to come directly from his mouth, from those hate-filled words that he used to describe a perfect stranger and from the lies that he told to the police to try to justify his actions," prosecutor John Guy told the six-woman jury.

The prosecutors stressed the use of the "f-word" and "punks," quoting Zimmerman's mobile phone conversation with a police dispatcher as he pursued Martin around the Sanford gated community. Zimmerman was in charge of the community's neighborhood watch.

Zimmerman's defense attorneys told a different story: the neighborhood watchman was a volunteer who shot Martin in self-defense. The defense kept repeating that Zimmerman was crying out for help when Martin was attacking him. After 40 seconds of yelling, Zimmerman felt his life was threatened and shot the 17-year-old in self-defense.

The 911 call was brought up by both sides in the murder case. The recorded screaming and the gunshot is a crucial piece of evidence in the case. Circuit Judge Debra Nelson ruled Saturday that experts for the prosecution testifying that it was Martin's screams on the recording will not be heard during the trial.

However, witnesses can testify to whom they believe the screams belong to on the recording.

"When he saw [Martin], he didn't see a young man walking home," the prosecutor said. "As he told the (police) dispatcher, he saw someone that was 'real suspicious,' someone who looked like he was 'up to no good,' again, to use his word."

For more information on opening argument, click here. To watch the live stream of the trial, click here.