AN UNUSUAL WAY TO SOLVE MURDERS -- ROADSIDE BILLBOARDS ON ABC NEWS� �20/20,� FRIDAY, OCTOBER 28

Also: �Commander In Chief� Star Geena Davis; Growing Tall� Kids Who Use Human Growth Hormones to Grow, Despite Possible Side Effects; The Most Popular Halloween Costumes of 2005

Can billboards help solve murders? One grieving father in Kansas says they can, and a growing number of police departments agree. A father desperate to find the person responsible for his 19-year-old daughter�s murder would not rest until he helped track down the killer. Roger Kemp�s daughter, Ali, was brutally beaten and murdered in June 2002, and even though dozens of detectives were on the case and the family offered a generous reward, none of the numerous leads the police received led to the killer. Then Kemp turned to a roadside billboard for help. A composite sketch of the alleged killer was posted on a billboard on a high-traffic street. Someone driving by the sign phoned in a tip leading police to the suspected killer who was hiding out 1300 miles away. Don Dahler�s report airs on �20/20,� FRIDAY, OCTOBER 28 (10:00-11:00 p.m., ET) on the ABC Television Network.

Until this case, billboards had been used for missing persons, but not for a murder case. �When Roger came to me and said, �what do you think?�� I thought -- that's perfect. It'll be awesome, because a newspaper, you read it, it's tossed in the trash. Television, it's aired, it's gone. Billboard, it sits there 24 hours, seven days a week,� says Major Craig Hill, the lead detective on the case. Because of the successful outcome, Kemp started a crusade to use billboards to catch other killers, and it has caught on in other states, including New Jersey and Louisiana.

And: Academy Award-winning actress Geena Davis speaks candidly to ABC�s Chris Connelly about growing up with low self esteem, her marriage to a man 15 years her junior, her new twins and her staring role as the first female president in �Commander In Chief.�

Plus: Are you too short, missing out on opportunities because tall people have an advantage? What if, when you were young, you could have done something about it? Today some doctors are recommending human growth hormones (HGH). Although these treatments, relatively new, can have side effects and the long term risks are unknown, they are becoming popular with some kids to narrow the gap between them and their taller peers, in part to boost not only their height, but their self esteem. The shots are expensive, costing upwards of $30,000 a year. �20/20� follows two teenagers and their parents for two years to see if the years of shots and testing by doctors are really worth it. John Stossel reports.

Also: Boo� it�s that time of year again when ghosts and goblins take over the streets across America. But what are this year�s most popular Halloween costumes? From �Star Wars� to princesses to sexy costumes for adults, Bill Ritter reports on Halloween 2005.

Elizabeth Vargas and John Stossel anchor �20/20.� David Sloan is the executive producer.