What type of lawyer do I need to sue the police? Civil lawyer?
You can find a lawyer to assist you by going to www.lawyers.com and in the section for Area of Practice enter Civil Litigation or Civil Rights. Either of those will have the skill set you need. You may want to look through both lists that come up when you enter those two areas of practice and see if any of the lawyers work in both areas.
After reading what I wrote do I have a case against the Prince William county police department?
You wouldn't likely have a case for anything up until the time the officer lied to the magistrate and/or the hospital. The law allows the police a lot of flexibility and leeway when they have been notified of a potential suicide risk. However, that leeway doesn't extend to lying to a judge or doctor and/or potential perjury (if the lies were "sworn").
What are the ramifications of an employee of the police department lying on a document given to a magistrate that had me taken into custody?
As I mentioned above it could be perjury if it was "sworn". That means either that it was on a document that was notarized or verified or the testimony was given in person after being sworn in.
The other ramification is that lying to deprive someone of their liberty is a violation of their civil right to due process as well as others (potentially).
To know the possible full extent of what will happen will require a review of all of the documents and witness testimony which, obviously, we can't do on here. However, I can tell you that it appears the officer's lies are a violation of both the state and federal civil rights guarantees and potentially a conspiracy to commit false imprisonment. There are likely others as well.
If your question has been answered then I'd offer my best wishes to you and ask that you please not forget to leave a Positive Rating so I receive credit for my work.
Of course, please feel free to ask any follow up questions in this thread. I want to be sure that all of your questions are answered. In addition, once you issue your Positive Rating the question will lock open and no longer time out so you can come back to it anytime in the future if you think of any follow ups.