There's an old adage; "Anything you need, you need two of." Almost certain the gun you used will be taken, possible that others will also. In which case, I'd borrow one unless under a specific court order.
I'd certainly be concerned, particularly if the bad guys had gang affiliations. Maybe send the family out of town for awhile, to a relative or friend. Also, I'd try to have friends around my place as much as possible, so if there is a retaliatory strike, there are more witnesses and/or defenders.
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