Kansas school principal caught using a fake resume

A story appeared on NBC News on April 6 about how high school students at Pittsburgh High School (Kansas)
uncovered errors in the resume of the new principal Amy Robertson, leading to Robertson's resignation.

CNBC noted:


Robertson, who had been approved for the role by the local board of education, claimed to have earned a bachelor's degree from the University of Tulsa, a master's degree and a doctorate degree from Corllins University, and a teaching degree from the University of Cambridge.

(...)

Robertson claimed to have received her M.A. in 1994 and her Ph.D. in 2010. But the U.S. Department of Education confirmed that Corllins University had been closed since 1986, and Robertson was also unable to provide evidence confirming her degree from the University of Tulsa. On April 4th, Robertson resigned.



The big question (not unrelated to thesis committees who approve Ph.D. theses with plagiarized parts)
is "why" the school board did not check out the resume of Robertson?

Link to cnbc:
http://www.cnbc.com/2017/04/06/these-high-school-journalists-uncovered-a-principals-resume-lie.html