If Eric Swalwell and Tony Gonzalez claim they aren't guilty of sexual assault then why did they resign?

This is always the telling thing from these men in power when a rape allegation slaps them. They go running and hiding, resign, go quiet until their attorneys piece together a battle plan - whatever, yet adamantly try to say the allegations are "false." At the end of the day it proves that you're guilty.

If Eric Swalwell and Tony Gonzalez claim they arent guilty of sexual assault then why did they resign?
If Eric Swalwell and Tony Gonzalez claim they aren't guilty of sexual assault then why did they resign?
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