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Citing concerns about privacy and civil liberties, he plans to push for tight regulations on any future use of the technology by police.
The victim had recently abandoned gang activity and been the subject of threats, his family said.
Medaria Arradondo cites increased pressures and workload.
Beefed-up patrols have only moved the activity a block, residents say.
The couple had previously been charged in the murder of 18-year-old Mohamed Abdi.
Prosecutors say they will ask to have the now-18-year-old suspect tried as an adult in the death of Susan Spiller.
Park Board Commissioner Londel French said he hopes others will learn from the incident.
Le'Vonte King Jason Jones, 2, was fatally shot in 2016, as he rode in a van with his 15-year-old sister and their father. The suspect charged Monday is currently serving a federal prison term on unrelated gun charges.
Officials say they have identified several replacement locations, notably the site of the Public Service Center.
Prosecutors have until noon Tuesday to file charges against the 37-year-old suspect, police say.