3 3 Any law enforcement officer will tell you, missing person cases are some of the most difficult to solve, especially when there's no obvious foul play involved. As dramatic new details on the Cleveland case come to light, officers across the country hope to learn from what went wrong during the initial investigation. Our own Alicia Booth was reporting in Cleveland during the decade those young women were in captivity. She joins us now with a look at what lessons law enforcement here may take away from this. 3 My sources in Cleveland tell me police there are conducting their own internal review of their investigation into those missing girls.They are focusing on the time when the teenagers were first reported missing.It calls attention to just how hard it is to investigate every missing teenager, but police here are hoping to learn from it. 3 nat girls returning in Cleveland) It's hard to take your eyes off the story of those three missing girls now reunited with their families in Cleveland.But as the world hungers for the details about what happened in Ohio, police here in Northeast Florida are focused on the investigation.. Hoping to learn from what Cleveland law enforcement may have missed in their search. 3 "You learn something from each and every one.Something you could do different and yeah, I'm sure we'll look at this case and say how could we have done things differently." Clay County detective Sgt. Wayne McKinney grew up in the Cleveland area so he has a professional AND personal interest in this case.He travels all over Florida teaching other law enforcement how to look for missing children.Each case, he says, has its own challenges. "Missing teenagers seem to be the toughest cases of all. In Clay county, detectives tell us they get reports of missing teens a couple of times a day." "The problem is if they're 17, 18, we're not going to do a neighborhood canvas every time a 17 year old goes missing, so one of the things we're gonna have to analyze as law enforcement is when do we make that determination? When do we go in every house in the neighborhood?" McKinney says it often comes down to a gut feeling and he teaches fellow officers to trust it and follow it.He also has advice for families."Don't give up looking." Just as Amanda Berry and Gina DeJesus's families never gave up .. neither has Mark Degner's.When he was 12, he disappeared from Paxon Middle School with his friend Bryan Hayes..that was 8 years ago.Hi mom, Linda Alligood, is pleased with the efforts of the Jacksonville Sheriff's Office now..but believes she wasn't taken seriously enough when she first reported her son missing. She hopes the investigation into the Cleveland Captives will help drive this point home. "Don't lose that first 48 hours.. keep it, do something with it. Don't think Sgt. McKinney tells us the decision to canvas a neighborhood is crucial.. you can't do it for every missing teenager, and that's where your gut comes in as an investigator. Also, he says it's extremely important to call in outside help when you're instincts are telling you there may be foul play. Here in Florida we have the child abduction response team... or CART.. he says they are training all the time. 3 )Kent - three people missing in the Cleveland case - but Alicia, you knew two of the names and faces better than another.You think that's what your detective is referring to?