In March, police in Phoenix stopped a man for a minor traffic violation. Due to the increasing prevalence of local police encounters becoming a pipeline for immigration arrests, he now faces deportation as a result of the stop, the head of an advocacy organization told the Phoenix New Times.

Phoenix’s new police chief has said he believes his department shouldn’t be involved in immigration enforcement. “As far I’m concerned, if we have a community member that’s scared to call the police based on their immigration status, whatever it might be, we’ve failed,” Chief Matt Giordano told KJZZ.

Neither the Phoenix Police Department, nor the Maricopa County Sheriff’s Office — which runs the jail where the man was booked after the traffic stop — currently has a formal agreement with the U.S. Immigration and Customs Enforcement to aid in arresting immigrants.

However, an ICE agent stationed at the jail screens people booked into the facility, and the jail notifies ICE prior to releasing anyone with a detainer — a request by ICE to hold someone until the federal agency takes them into custody. The Arizona Republic identified more than 100 people who were charged with federal immigration offenses after being held at the jail.

All of this demonstrates how contact with local law enforcement can lead to an immigration arrest, detention and deportation, even in jurisdictions where leaders try to put distance between police and immigration enforcement, preventing a pipeline for immigration arrests from forming.

Under the second Trump administration, participation in ICE’s 287(g) program, which allows police to enforce immigration law and share information with ICE, has expanded from about 130 agencies to more than 700. This week, the Department of Homeland Security announced it would pay the salaries and benefits of eligible local 287(g) officers.

As the program has expanded, some states have passed laws that criminalize the presence of undocumented immigrants, or even giving aid to them. Political pressure has also reversed policies that limited the role of local police. Following the administration’s move to take over the Metropolitan Police Department in Washington, D.C., Chief Pamela Smith allowed officers to notify ICE about undocumented people they encounter during stops.

Read the full article about police encounters leading to ICE arrests by Geoff Hing at The Marshall Project.