At one point, West suggested that though Martin told her he was by his father's fiancee house while Zimmerman was following him, that she doesn't know that for sure.
"Why he need to lie about that, sir?" Jeantel asked West.
"Maybe if he decided to assault George Zimmerman, he didn't want you to know about it," West replied.
"That's real retarded, sir," she said. "That's real retarded to do that, sir."
When asked by West if she had previously told investigators that she heard what sounded like somebody being hit at the end of her call with Martin, Jeantel said, "Trayvon got hit."
"You don't know that? Do you? You don't know that Trayvon got hit," West answered angrily. "You don't know that Trayvon didn't at that moment take his fists and drive them into George Zimmerman's face."
Later in the morning, West accused Jeantel of not calling police after Martin's phone went dead because she thought it was a fight he had provoked.
"That's why you weren't worried. That's why you didn't do anything because Trayvon Martin started the fight, and you knew that," West said.
"No sir!" Jeantel said. "I don't know what you're talking about."
At one point, West handed her a letter she had written with the help of a friend to Martin's mother explaining what happened. She looked at it but then said she couldn't read cursive handwriting. Jeantel later explained she is of Haitian descent and grew up speaking Creole and Spanish.
Thursday's testimony began with a more subdued tone that it did a day earlier, when Jeantel frequently bristled at West's questions and she at one point told him to move on to the next question: "You can go. You can go."
West took note of her calmer demeanor in the morning. She answered many of West's early questions by repeating "yes, sir," almost in a whisper.
"You feeling OK today? You seem different than yesterday," West said.
"I got some sleep," she answered.
After Jeantel left the witness stand, a mobile phone manager testified about Martin's cell phone records and a former neighbor of Zimmerman testified she heard yelps for help outside her townhome on the night Martin was shot. Jenna Lauer said she couldn't tell who was screaming.
"They were being hurt," Lauer said, describing the person screaming.
Before court recessed for the day, defense attorney Mark O'Mara asked another former neighbor to recreate for jurors how she reacted when she heard what turned out to be a gunshot and ran out of her town-house to see what was going on. The request had Selma Mora in the unusual position of standing up from the witness stand and pretending to be in her kitchen in front of the judge's bench.
Follow Kyle Hightower on Twitter at http://twitter.com/KHightower
Follow Mike Schneider on Twitter at http://twitter.com/MikeSchneiderAP