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Sneak peek: Eliminating the Threat?

Name: Sneak peek: Eliminating the Threat?
Uploaded: 2016-08-17T10:00:00-0400
Duration: 3 min 16 s
Description: An elite FBI agent shoots his estranged wife after he says she came after him with a knife -- was it self-defense or murder? "48 Hours"' Susan Spencer investigates Saturday, Aug. 20 at 9 p.m. ET/PT on CBS.

An elite FBI agent shoots his estranged wife after he says she came after him with a knife -- was it self-defense or murder? "48 Hours"' Susan Spencer investigates Saturday, Aug. 20 at 9 p.m. ET/PT on CBS.