The officer was responding to a request for assistance April 30. He found Dontre Hamilton on the ground, and a subsequent pat-down led to a struggle. The officer eventually shot Hamilton as many as 10 times.
On Monday, the family's lawyers released a statement saying authorities continue to keep the family in the dark. The attorneys say investigators aren't returning calls or providing updates.
Milwaukee police referred questions to state Department of Justice officials, who are leading the investigation.
DOJ spokeswoman Dana Brueck says authorities are communicating with the family to the extent possible during an ongoing investigation.