the disappearance of isabelle salas. her parents say they last saw her in bed saturday night and discovered she was missing sunday morning. casey stegall joins us with more. >> reporter: special f.b.i. dogs were brought in in the overnight hours from the agency's virginia headquarters. these are k-9's specifically trained in searches like this. we have brand-new information coming in that those dogs have alerted on something that has opened up new leads that are currently being sold u followed up on. however, police will not elaborate on what was discovered specifically. cops confirming today that the first-grader's bedroom window was open and the screen was knocked out, but they are still only classifying this as a possible abduction at this point. in fact no amber alert has been