Candidates running for Norfolk County District Attorney say the growing field signals that residents are “ready for real change” from the embattled Michael Morrissey, with a former federal prosecutor the latest to enter the fray.

Adam Deitch, who led the federal investigation into the death of Boston police officer John O’Keefe, says he has received an “incredible response from Norfolk County residents” since launching his campaign on Tuesday.

Deitch, who also investigated the ensuing state investigation and prosecution of O’Keefe’s girlfriend, Karen Read, joins Dedham resident Djuna Perkins and Cohasset resident Craig MacLellan as candidates looking to take over the Norfolk DA’s office.

“I’m looking forward to spending all of my time over the next year,” Deitch told the Herald on Wedne

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