An anonymous airline passenger is being hailed as a hero after she stopped a potential sexual assault by glancing at a fellow passenger's text messages.

A preschool teacher was on a flight from Seattle, Washington to San Jose, California when she noticed that the man in the row in front of her was sending explicit texts about sexually abusing children.

The teacher alerted Southwest flight attendants about the situation, who then contacted law enforcement authorities on the ground. After the plane landed, Kellar was taken into custody.

His text messages then led to the arrest of the woman with whom he was corresponding: a 50-year-old Tacoma resident named Gail Burnworth who had been babysitting two children ages 5 and 7.

If the plane passenger had not intervened upon seeing the messages, it is quite possible that the children would have been exploited by Burnworth or Kellar.

According to news sources, Kellar is being held at the Santa Clara County Jail, while Burnworth is being held at the Pierce County jail, both of whom are being charged with attempted child molestation and solicitation of sex crimes.

"It's kind of mind-blowing," San Jose sex-crimes Detective Nick Jourdenais told the Mercury News about the anonymous passenger. "She gets on a plane, a normal citizen minding her business. A couple of hours later, she's intervening on quite possibly the most traumatic thing children can go through. This was life-altering for them."

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