The Boston Herald is reporting that call logs show an officer was dispatched to a Lynnfield, Massachusetts, house that ended with one man dead.
Police were dispatched to the gated mansion for a property check, just after 9 p.m. last Saturday.
The call was cleared about nine minutes later, but some six hours later, Keivan Heath was shot and killed at that home.
He was one of dozens of guests at the home.
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Two off-duty Boston police officers were also at the party and are cooperating with the investigation.
No arrests have been made.