Roughly three months after 30 musical instruments were stolen from a first-floor classroom at Robert Fulton Elementary School, one attorney teamed up with renowned Chicago blues singer Larry “Mud” Morganfield to bring music back into the students’ lives.Mark L. Karno of Mark L. Karno & Associates LLC helped facilitate a donation presentation and mini concert held Thursday during an assembly at the Southwest Side school.After reading an article about the incident in the Chicago Tribune, Karno said he …