Pretti was shot and killed by federal officers on Jan. 24.
"Our hearts are broken." San Francisco's immigration building became the site of a memorial Wednesday as interfaith leaders, advocates and families gathered to remember dozens of people who recently died in immigration detention centers or were shot and killed by ICE agents.
U.S. Immigration and Customs Enforcement (ICE) arrested 51,000 individuals in July, according to sources familiar with the data.
A Salvadoran migrant who was in ICE custody died following a "medical emergency" over the weekend, federal officials said.
A Johns Hopkins University researcher, originally from Cameroon, was detained by Immigration and Customs Enforcement officers earlier this week.
Collins said all ICE agents will wear body cams nationwide by the end of August.