Family members say the man killed by a U.S. Border Patrol officer in Minneapolis on Saturday was an intensive care nurse at a Department of Veterans Affairs hospital who cared deeply about people and was upset by Donald Trump’s immigration crackdown in his city.

Alex Jeffrey Pretti, 37, was an avid outdoorsman who enjoyed getting in adventures with Joule, his beloved Catahoula Leopard dog who also recently died. He had participated in protests following the killing of Renee Good by a U.S. Immigration and Customs officer on Jan. 7.

Pretti was a U.S. citizen, born in Illinois. Like Good, court records showed he had no criminal record and his family said he had never had any interactions with law enforcement beyond a handful of traffic tickets.

In a recent conversation with their son, his parents, who live in Colorado, told him to be careful when protesting.