Yes, a chiropractor can help put you on the right path when it comes to healing an injured knee. They can also help you figure out what could have contributed to the injury in the first place. For example, maybe you walk more to the left and put additional strain on your left hip which left your knee lacking the strength it needed to perform the task.
By fully understanding how your personal alignment and how any misalignment is leaving portions of your body vulnerable to injury you can not only heal current injuries but prevent them from happening in the future.