Kayla Berg missing

One of her brother's friends picked Kayla up at her father's house at about 8:30 p.m. The two arrived at McDonald's half an hour later. Kayla ran inside, talked briefly with her friend, and then left. She had told her friend she planned to ride around in the car for a while.

"The last we pretty much know about the story we have, is around 10 p.m.," said Antigo Police Chief Eric Roller. "The male says he dropped her off ... at her boyfriend's house in Wausau." Wausau is 34 miles from Antigo.

Sprenger didn't approve of the boyfriend. "I didn't feel comfortable that he was 19 she was 15," she said.

The brother's friend said he last saw Kayla when she got out of his vehicle and walked toward a house she said was that of her boyfriend.

No one else saw Kayla get out of the car, Roller said, but investigators were able to confirm that the 24-year old driver returned at midnight to his parents' house in Deerbrook, about 45 minutes away.

Six days later, on August 17, Kayla's mother reported her missing.

A reward is being offered by Kayla's family for information leading to the arrest and conviction of anyone responsible for her disappearance. An additional reward is being offered by Langlade County Crimestoppers.

Anyone with information is asked to contact the Langlade County Police at (715) 627-6411 or Crimestoppers at (715) 627-6245.  http://www.cnn.com/2010/CRIME/06/21/grace.coldcase.kayla.berg/