The Department of Homeland Security this week joined the desperate search for a Pennsylvania teenager and the 45-year-old man she disappeared with more than a week ago.
The search for Yu and Esterly entered its eighth day Tuesday.
Allentown police said on Monday they believe the two are aware that authorities are searching for them.
Esterly signed out Yu from Lehigh Valley Academy 10 times between Nov. 12 and Feb. 9 without her parents’ permission, authorities said. He was able to do this because the girl had altered her student records to list Esterly as her stepfather.