To get a closer look at how guns and ammo flow from Southern Arizona into Mexico, the Arizona Daily Star analyzed the 32 weapons-smuggling cases involving Mexico filed in federal courts in Tucson and Phoenix in 2018. The map below details the various stages and routes of weapon trafficking in each court case. Some cases only detailed where the guns were purchased and by whom, while other cases noted the routes that weapon traffickers took. The map also shows where authorities recovered some weapons in Mexico.

All the information in the map comes from court records.

Alex has been with the Star since June 2019. He previously wrote about the environment for the Arizona Republic and he's a graduate of the University of Arizona.