A woman accused of beating a teenager yesterday insisted her former friend had committed the crime.

Trimeia Roland said she watched as her former friend Garrina Cann hit Brittany Symonds with a piece of wood before leaving her on the ground, covered in blood.

She claimed her co-defendant, Cann, could be an angry person.

Roland said she watched as Cann "whacked" the 17-year-old over the head and on the back at least seven times.

Both Roland, 22 and Cann, 21 deny wounding Miss Symonds with intent to do grievous bodily harm.

Miss Symonds needed ten stitches and four staples in her head as a result of the alleged attack in St. David's on February 2.

She also required two stitches in her upper back and three in her left thumb.

The court has heard the pair attacked the teenager after she refused to hand over her cell phone.

Yesterday, Roland said she followed Cann up to Mount Road that night after Cann discovered her iPod box was missing.

Roland said Cann thought her cousin, Keva Outerbridge stole the box and went to find her.

"I was pretty sure that Garrina wanted to fight my cousin," she said.

Asked by her lawyer Arisha Flood why she would think that, Roland said: "Because it's part of her character."

Roland said she spoke with Miss Outerbridge's sister, Jewels Fox, who pointed her in Miss Outerbridge's direction.

"I walked off from Jewels and went around the bend but I heard an altercation taking place. I heard whacking sounds and shouting. I didn't know what it was but it sounded like it could have been someone hitting against the wall. It was just a 'whop, whop whop'."

She continued: "My first thought was that she caught up with my cousin. I made my way around the corner and I saw Garrina hitting somebody but I didn't know who they were. I didn't recognise them as being someone I know."

She said the victim turned out to be Miss Symonds.

"She was getting hit in her head and I pulled her away. I kind of flung her. Not intentionally trying to hurt her but she fell to the ground.

"I was leaning over her trying to figure out who she was and why she was being hit on her head. She was dripping blood on the concrete and she was crying."

Roland said she left the scene on foot with Cann who was talking about the "girl she attacked" as they walked.

She said they went back to Cann's home and changed her shirt so that she wouldn't be identified as being a part of the fight.

Crown counsel Maria Sofianos quizzed Roland on how much she had to drink that night.

Roland admitted having three WKDs and "a couple shots" of Courvoisier at a birthday party earlier that night.

She said Cann had several drinks including a mix of shots, a combination of vodka and Courvoisier and a few WKDs.

Ms Sofianos suggested Roland left the party with Cann to look for Miss Outerbridge but Roland disagreed.

She said although she was then "tight" with Cann, Miss Outerbridge was her cousin and "blood is thicker than water".

Cann's lawyer Marc Daniels questioned Roland's character, suggesting she was a dishonest person because of prior convictions.

He also suggested she was lying about her version of events.

"The reality is you wanted to see some drama that night. You were excited at the party. You had been drinking and you know that Garrina can be loud when she talks and the truth is that she is quick to tell off someone if she feels wronged and you thought that you were going to see somebody tell somebody off."

Roland disagreed.

The trial continues.