The coroner is investigating, but a forensic examination completed Monday determined the boy died from a severe infection caused by the bite.

The boy's mother, Mandy Pierce, talked with KZBK-TV and said they took Keith to the hospital after his leg started to swell Sept. 30.  After ruling out cancer, Keith was sent home.

Days later the pain and swelling in Keith's leg prompted another trip to the hospital where Mandy told KZBK say doctors performed emergency surgery Sunday morning from which Keith never woke up.

According to KZBK, the parents had to decide to end resuscitation efforts early Monday morning.

Mandy told KZBK that parents need to learn more about brown recluse spiders and talk to an exterminator about having your house sprayed.

According to the Remembering Keith Pierce Facebook page, a benefit auction for the Pierce family will be held on Saturday, October 18.

The Three Forks School District brought counselors and ministers to the boy's school Monday to speak with parents, teachers and students.

—The Associated Press contributed to this report

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