Steve Walking is a jerk in a wheelchair, who abuses his wife, Helen, who is also in a wheelchair. He works as a college professor.
In "Brian Goes Back to College", Steve was the college professor of Brian Griffin. Brian was so good of a student that Steve invited him over to his house to meet his wife, Helen. Helen was also a cripple and Steve was blatantly abusive to her at the party.
In "Disney's the Reboot", Steve was featured in the Family Guy reboot, "Family Guy Again", where he was the owner of a crippled record company called "Spinwheel Records". He gave Joe a job because of his music.