The legal battle between the U.S. government and immigrant rights groups has been fought in court since just after the 2014 Central American migrant crisis.
Under new legislation tribal courts would be able to protect child victims of domestic abuse in Indian Country.
Polygraph examiners for the Border Patrol are criticized for how they manage examinations in the agency's Tucson sector.
The Border Patrol has traditionally been led by former agents
Mexican authorities in the border state of Sonora are awaiting a U.S. extradition order for a man wanted in the murder of his wife and four daughters in New Mexico.
The suit was filed in U.S. District Court in Tucson last week.
Federal agents are investigating a Yuma area shooting.
Part 5: Over the last three years, tens of thousands of unaccompanied minors have fled Central America for the U.S. At least 19 have wound up in the hands of labor traffickers.
Part 4: In the last two years, more than 10,000 child migrants have faced deportation proceedings without ever finding a lawyer to help them. Thousands more children face the same fate despite government efforts to fund more free lawyers.
Part 3: The border Mexico shares with Guatemala has changed since Mexico began its southern border plan in 2014. A town that once symbolized the migrant trail is now emblematic of how migration routes have splintered and become more dangerous.