Blair and Jonathon Miller wrote a letter to Adam Montgomery asking him to cooperate with law enforcement searching for his daughter Harmony Montgomery.
Gov. Chris Sununu in a letter said that had an Interstate Compact for the Placement of Children home study been completed Harmony Montgomery would not have been turned over to her father.
Blair and Johnathon Miller told ABC's Good Morning America on Saturday their 5-year-old son often asks about his sister but he is unaware of her disappearance.
Manchester Police Chief Allen Aldenberg said all the tips are being vetted and taken seriously and asked for more information to be reported to a special tipline manned 24/7 at 603-203-6060.
Attorney General John M. Formella did not disclose what detectives found during the search of the home on Gilford Street but continued to ask for the public's help in trying to locate Harmony Montgomery.
A third passenger, a 12-year-old girl. was hospitalized for non-life-threatening injuries while a worker in the toll plaza sustained moderate non-life-threatening injuries.