"If anyone knows who this bitch is throw his info under this tweet." - it's not just "tweeting a cop's photo"
Unless you think that calling a police officer a bitch is a felony.
If you're going to request personal information for a legitimate reason then you should word it in a non threatening manner.
And given the context of calling a police officer a "bitch", do you think the requester was doing so to accurately file a complaint... or doing so in the hope that armed with the cop's identity, somebody would engage in harassment of that man and/or his family?
Being charged with a felony for the tweet is absurd.
But painting this as an innocent request for information is almost equally so.
To be honest, I read that tweet as fairly ordinary use of vernacular and I wouldn't assume malicious intent.