Even if I were sued, I document everything and obey the law, so I won't be found guilty.

In many states pleading can be viewed online though I've never had much luck in VA.

Even if I were sued, I document everything and obey the law, so I won't be found guilty.

Gotta plead ignorance here. 

May be a challenge getting in front of a judge to plead your case though.Also, the judge may simply ask why you can't just treat the infestation instead of evicting.

Would you feel guilty if someone died in the basement when there was a fire because they couldn't get out? 

Call them back and plead ignorance.

Now, with that said, you should protect yourself by filing a law suit against the person of interest and have a judgement from the court to back your statements, before posting names, numbers and personal info on line.Even if the person has done such a dastardly job and ripped you off, he/she must be found guilty in either small claims court ($14-$29) filing fee depending what county in WA State, Civil/Superior ($20-$400) filing fee depends what county in WA.

His emails to me make me feel guilty for going after him...

Last time I filed an eviction here in NJ it apparently turned up before the court date and the tenants showed up with the money pleading for me to rescind and write a letter saying it was all a mistake as they had a new place all lined up but the eviction case was causing a problem.Now I have a tenant acting all psycho, not responding to emails or calls, and I think she's going to withhold rent and force me to eviction court so she can tell someone how awful we are that her apartment was in the 60's when the entire east coast was frozen.