When Megan kills Trent in the garage, she tells the TV news reporter that the garage is at Corinth and Michigan. Those two streets do not cross in Dallas. After that Garcia triangulates Megan's position as 1818 Corinth with a zip code of 75273. An 1800 block of Corinth exists, but It doesn't have an 1818 address. A food processing plant exists where that would be, not a parking garage. Even if the address did exist, the zip code would be 75215, not 75273. Furthermore, Garcia's map shows the address to be in the Trinity River green belt, but the 1800 block of Corinth is at least 10 blocks from there. The garage is also nowhere near a skyline that's shown when the BAU arrives.