It was an ordinary day in 1997. Darleen Savoji's son, Anthony, then 12, wiped out on his bike riding through his Newport Crest condo neighborhood.

And suddenly, there was James Crummel.

The man had a Band-Aid for the boy and invited him into his condo to drink soda and watch dirt bike videos.

Well, this time he picked the wrong boy to invite inside.

Because Anthony went home and told mamma bear the story of the nice man and mamma bear went berserk.

Darleen walked out of the garage where she was doing laundry and marched over to Crummel's condo to find out what sort of man invites a kid in to drink soda and watch BMX videos, because it didn't sound like any men she knew.

There was no answer.

The next morning she went out on her doorstep to get the newspaper and found a flier from the Newport Beach Police Department alerting neighbors that a high-risk sex offender was in their midst. It was only the second time in the history of Orange County that the then-new Megan's Law was being tested.

Darleen showed her three kids the flier of the 53-year-old man at the breakfast table.

See, she lectured, this is exactly why when a man invites you in for soda you run the other way. So thank you for coming right home, Anthony, and telling your mom.

Mommy, he said, looking at the flier. That's the man who invited me in.

OK, breakfast is done, she told the kids. Off to school.

Then she marched back to Crummel's, a block down, this time with the flier in her hand and started banging on the door.

Hello? Hello?

As she was leaving, television reporters emerged from the bushes.

Who are you they asked?

I'm a mom, she said.

Read more about Darleen's story here. She joins John and Ken at 4:00