This last clue is located in Peachtree Park/City Hall Park on one of the picnic tables in the park located between City Hall and PD. This clue will require you to use all the previous clue letter/number combinations starting with the letter "M" to show:
J = M, 10 O = N, 15 D = O, 4 I = P, 9 E = Q, 5
W = R, 23 I = S, 9 L = T, 12 F = U, 6 I = V, 9 L = W, 12 L = X, 12 A = Y, 1 N = Z, 14
Once you have this answer, be sure to email Katie Sears at firstname.lastname@example.org for a special prize! If you finish during office hours, come into City Hall to collect your prize! Otherwise, you will receive an email about instructions for picking up your prize!