Brittany Norwood was found guilty of first degree murder of co-worker Jayna Murray at the Lululemon Athletica store in Bethesda, Nov. 3, 2011.
ROCKVILLE, Md. (WUSA) -- Three witnesses were called to the stand Monday in the lululemon Bethesda murder trial in Rockville.
The three included a police officer, a forensic lab director and expert in blood patterning, along with an expert in forensic biology.
More photos were also introduced in the case for the jury, including graphic photos of blood spatter found on the walls to illustrate witness' findings and photos of the victim, Jayna Murray, found at the crime scene.
LULULEMON MURDER TRIAL EVIDENCE PHOTOS- VIEWER DISCRETION ADVISED
Dr. William Vosburgh , a Forensic Lab Director and expert in blood patterning, was shown photos and asked to give a conclusion of the evidence found. He concluded that the beating followed a pattern where the victim was standing, then crouching, and then on or near the floor. In one of the photos, you could see the victim, Jayna Murray, on the floor and that her shoes were noticeably clean of blood. Dr Vosburgh testified that her shoes were fairly clean of blood, though pools of blood were found around her, concluding she was not standing very long.
"You would call it a quick timeline of the victim, Jayna Murray, standing then on or near the floor," explained Dr. Vosburgh.
Defendant Brittany Norwood faces 1st degree murder charges after co-worker Murray was found beaten to death with a box cutter, hammer and various toolbox items in the back of the Lululemon Athletic yoga store on March 11.
Norwood's lawyers argue that she did not plan to murder Murray that evening. They say when the two women began fighting, when Norwood lost control and killed Murray.
The difference in charges would be 1st degree murder or 2nd degree murder. A first degree murder conviction carries life without parole. A second degree conviction carries the maximum penalty of 30 years, with eligibility for parole in 15 years.
When police arrived on the scene March 12, Norwood was tied up and suffering from minor injuries. For a week she told police she and Murray were attacked by two masked men who threatened to "slit her throat."
FAMILY PHOTOS OF JAYNA MURRAY
In a testimony played for the jury Thursday, Norwood said, "They drug Jayna by her hair. He was repeatedly hitting her. And she was screaming and I couldn't do anything. There was so much blood."
After detectives couldn't piece together her story or identify the two men, Norwood became a prime suspect. She was taken into custody a week later.
State attorney John McCarthy has now called a total of 14 witnesses to the stand. Some of the most shocking testimonies came Friday, when two Apple Store workers admitted to hearing the murder take place behind connecting store walls.
"I heard noises coming from the right side of the store- something heavy sounding," Apple employee Jana Svrzo said. "Like it was being hit or dragging, some grunting and some thudding."
The state then went on to show surveillance video of Srvzo listening through the wall and going upstairs to tell her store manager of the noises. She even alerts a security officer to the sounds.
"We approached the area of the store where the sound was the loudest. At that point we heard some screaming or yelling. It sounded hysterical," Svrzo said.
Srvzo then said some of the most chilling evidence of all. She could hear two female voices, one hysterically, "God help me, please help me."
Apple store manager at the time, Ricardo Rios, said when he came downstairs he could also hear voices.
"It was more like a panting, kind of like when you can't breathe and need to catch your breath and talk," Rios said.
He heard one of the voices say, "Talk to me. Tell me what's going on."
After Rios' testimony the state asked if the two security guards working that evening were fired. Rios said one of them had headphones on their ears, but both were fired that weekend of the murder.
Prior to the Apple store employees, the state also called two co-workers that worked with Norwood and Murray.
Lululemon employee Chioma Nwakibu talked to Murray around 9:48 p.m. the evening she was murdered. Murray asked her, "Did you sell these pants to Brittany?" Nwakibu replied, "No."
Murray had been inquiring whether or not the pants in Norwood's bag were stolen.
When the defense held up a picture of the pants Norwood was tied up in the morning police found her and Murray, the co-worker testified she was wearing a different pair of pants than the day before.
The prosecution says Norwood disposed of her bloody pants after the murder.
Other Lululemon co-worker, Elia Rab, was also called to testify. She says both Murray and Norwood were close friends to her. Her hands shook as she pointed out where the store keeps all their knives and merchandising tools, both of which were used to kill Murray.
Rab then went on to say that she saw Norwood the day of Murray's murder.
"I went to lunch with her. I got a manicure and pedicure with her," Rab said. "We were running close on time...I went to the store at 3 p.m. to tell Brittany I was leaving the Bethesda area."
Earlier in the day, the state also called Rodney Smith, Angel Cabrera and Amanda Kraemer to the stand.
Kraemer was the forensic services officer that investigated the scene.
Kraemer walked the jury through her investigation, pulling out each piece of evidence along the way. She showed Murray's belongings, including her jacket, shoes and metro pass that she had given to Norwood earlier the evening she was killed.
LULULEMON MURDER TRIAL EVIDENCE- VIEWER DISCRETION ADVISED
She then started running through the contents of the toolbox, which police say was used to kill Murray. Kraemer was asked to show the hammer, merchandising tool and white cord that was wrapped around Murray's neck.
When asked about blood evidence present in the crime scene, Kraemer said, "Some of the shoe prints under the ladder were in a way that would have been un-natural."
Judge Greenberg released these photos and evidence late Thursday night.
9NewsNow will continue to update as testimonies continue next week.