Migrant center tunnel.
Ann Ott school in Phoenix is one of the oldest school's in the city. It is 2.8 miles away from the Maricopa County courthouse. Here is an article that says there was a tunnel in the freeway to get to the other side. The Ann Ott's school is now the location of the migrant shelter that James O'keefe featured in his latest story.
1211 E Apache St, Phoenix, AZ 85034
https://www.newspapers.com/image/117718930/?terms=tunnel&match=1
https://journeyscope.com/phoenix-arizona/