The juror also said that she and most of the other jurors believed Mr. Zimmerman was the one screaming for help during the recording of a resident’s 911 call because he was the one being beaten. An “important” piece of evidence, she called it.

“It was a long cry and scream for help — whoever was crying for help was in fear for their life,” she said.

For whatever reason, Mr. Martin, she said, decided to confront Mr. Zimmerman and threw the first punch.

“Trayvon got mad and attacked him,” she said.

The juror also said that Rachel Jeantel, Mr. Martin’s friend who spoke to him on the phone moments before he was killed, was “not a good witness.” The juror said Ms. Jeantel “clearly didn’t want to be there.”

Clearly sympathetic to Mr. Zimmerman, the juror, who is married to a lawyer and has two grown children, referred to him as George. She said she felt sorry for Mr. Zimmerman and for Mr. Martin, calling the situation a “tragedy.” The six women became very emotional, she said, immediately after they handed their verdict to the bailiff.

“It’s just sad that we all had to come together and figure out what is going to happen to this man’s life afterwards,” she said. “You find him not guilty, but you are responsible for that not guilty, and all the people who want him guilty aren’t going to have any closure.”

On Monday it was announced that the juror had signed with a literary agent with the intent of writing a book. But by early Tuesday, the agent, Sharlene Martin, had rescinded the offer and the juror dropped her plans to write a book. The juror said in a statement that being sequestered “shielded me from the depth of pain that exists among the general public over every aspect of this case.”

“The potential book was always intended to be a respectful observation of the trial from my and my husband’s perspectives solely and it was to be an observation that our ‘system’ of justice can get so complicated that it creates a conflict with our ‘spirit’ of justice,” she said in the statement. “Now that I am returned to my family and to society in general, I have realized that the best direction for me to go is away from writing any sort of book and return instead to my life as it was before I was called to sit on this jury.”