A McAllen K-9 police officer walks past rebar that will make up the border wall before DHS Acting Homeland Secretary Chad Wolf tours and speaks to the local media at the border wall under construction on Thursday, Nov. 21, 2019, south of Donna, Texas./The Monitor via AP)

WASHINGTON, D.C. (AP) – The Defense Department’s internal watchdog is investigating a $400 million border wall contract awarded to a firm that used multiple appearances on Fox News to push for the job.

The Pentagon’s inspector general sent a letter Thursday to House Homeland Committee Chairman Bennie Thompson telling him they would audit the contract awarded to North Dakota-based firm Fisher Sand and Gravel Co.

Thompson asked for the review last week, in part over concerns the proposals did not meet operational requirements and prototypes came in late and over budget.