Swordplay (Jeff Woods Mystery #3)
Chris T. Kat

Life is difficult at the best of times. Sean loses sight in one of his eyes, a direct result of being pushed into the Atlantic by a homicidal maniac a year ago. In his struggle to deal with everything, a restless Alex enrolls in tai chi classes at a nearby school.
As it happens, a murder case Jeff and Parker take involves the head of that very tai chi school, Charles Cooper. Cooper is a suspect in the murder of a financial corporation official. He appears to have motive. Jeff and Parker's investigation arouses the real killer’s interest, and if they don't uncover his identity soon, it may be too late for them.