Hello,
I purchased "Professional Outfits Cloth Bases" last week. I'm looking for a police officer plugin/ avatar as shown in the advertisement, but can\t seem to find it. I need one for a short scene in an animation.
Thanks for your help.

Unfortunately, there is not an actual police uniform in that set.  You can use the dress shirt and slacks and add a badge or patch to the shirt, or if you think will be using police in more projects you should look at this set:
https://marketplace.reallusion.com/policeman-uniforms-and-gears
I think it is on sale for 20% off right now.

Reallusion Certified Director / Reallusion Best Visual Award / Reallusion Certified Content Developer
See all the G-Tools Plug-Ins available for iClone here: G-Tools Plug-Ins

You can find the police officer on the RL Marketplace for free: Police-Male
There are many more free downloads for the Professional Outfits on the Market Place.

Best Regards,
Arie