What if it is about an actual legal matter?
Send it through Practus, LLP, which is where the legal work happens.
An inquiry that arrives through the firm gets checked for conflicts before anyone reads the details of it. That protects you at least as much as it protects anybody else, because a conflict discovered after you have described your situation is a worse outcome for you than for the firm.
Can I just call and talk to a person?
Call 816-343-4301, or write to contact@jessecamacho.com.
Both reach him. A first conversation does not commit you to anything and does not require you to have your situation organized before you start.
What should I leave out of a first message?
The confidential parts, until an engagement is actually in place.
A first email is not privileged. Describe the situation in general terms, name the other side if you can so that conflicts can be checked, say what arrived and roughly when, and keep the sensitive detail for a conversation once there is a relationship to protect it.
Nothing sent through this site or by email before an engagement creates an attorney-client relationship.
Does it matter that he is in Missouri?
Rarely. Patent cases are federal, and they are heard in districts all over the country.
The office is in Kansas City, Missouri. The cases have been in California, Delaware, Texas, Virginia, Pennsylvania, Illinois and Tennessee, at the Patent Trial and Appeal Board, and at the Federal Circuit.