So far, 19 people have testified in the first three days of the Renisha McBride shooting trial and prosecutors are expected to call even more witness to stand trial on Tuesday.

McBride, a 19-year-old African American woman, crashed into a parked car in Detroit after a night of drinking alcohol and smoking marijuana on Nov. 2, 2013. She wandered around for hours before she ended up in the suburban neighborhood of Dearborn Heights and knocked on Theodore Wafer's door around 4:30 a.m.

Prosecutors say that Wafer opened his door and shot the unarmed teen in the head around 4:40 a.m.. However, the defense claims that he feared for his life and shot her in self-defense. The 55-year-old defendant faces up to life in prison if convicted on charges of second-degree murder, manslaughter and felony use of a firearm, reported HLN-TV.

On Monday, Wafer's neighbor, Ray Murad, testified that he heard McBride crash her car and a gunshot about 10-15 minutes later.

"I didn't see anything," he told the Wayne County Circuit Court, reported the Detroit Free Press said. "I went outside but not all the way to the street."

McBride's friend, Davonta Bynes, also took to the stand on Monday, telling the jury that he spoke to McBride a little after 10 p.m. on Nov. 1 and that he suspected that she had been drinking because she was slurring.

"She sounded like she was having a good time," he said.

Once under cross-examination, Bynes admitted that McBride sounded intoxicated and that he thought that somebody slipped something into her drink.

According to Michigan State Police Detective Sgt. Kevin Lucidi, a traffic crash reconstructionist, McBride was driving at approximately 31-43 mph when she crashed.

Last Thursday, Wafer testified that he didn't know his gun was loaded when he fatally shot the teen on his porch

During opening statements, Wafer's defense attorney told jurors he was awakened by repeated loud bangs on his front and side doors, which led him to believe that multiple people were outside of his home. He then grabbed his shotgun after he heard metal breaking on his screen door and opened his door because he didn't know what to do, his attorney said on Wednesday.

However, prosecutors claim that Wafer's "actions that night were unnecessary, unjustified and unreasonable," Assistant Wayne County Prosecutor Danielle Hagaman-Clark said.