In In re Arlyne A. (2000) 85 Cal.App.4th 591, the department was informed that the appellant's parents were living in Rialto. Further, the department was informed that the appellant's home and work addresses were listed on a police report at the Colton Police Department. Despite this information, the department did not even take the rudimentary steps of checking directory assistance for the parents' telephone number in Rialto, or asking the Colton Police Department for a copy of the report. ( Id. at pp. 598-599.) The court of appeal found these deficiencies fatal to a finding of due diligence. "Although the Department searched the standard avenues available to help locate a missing parent, it failed to search the specific ones most likely, under the unique facts known to the Department, to yield appellant's address. Accordingly, the trial court's finding of reasonable diligence is not supported by the record." ( Id. at p. 599.)