Hiring a lawyer that specializes in something completely different from what you might need will not be all that great of an idea for you if you think about it. There is a pretty good chance that this attorney might have some kind of knowledge about the details that pertain to your case, but the truth of the situation is that if they are not specialized in the field that you require then they will be very limited with regards to the kind of help that they would be capable of offering to you.
This is because of the fact that the legal field is really diverse, so if you find yourself requiring the services of someone that can help you with personal injury then you need a law firm for personal injury cases in the San Antonio area. Finding a law firm that specializes in this is quite easy. All you really need to do is a bare minimum amount of research after which you will find a list of firms that operate within these kinds of areas, all of which would be more than willing to take your case on for a fee.
Reading up about these firms will help you figure out what kind of results you can end up expecting from them. For a lot of these firms, the thought of a client suffering a bad result in court is not something that they would be willing to tolerate. Hence, you should place a bit of trust in the system since it is meant to enable you to get a lot more out of your life on a regular basis and feel more secure as a result.