1) Found the source of the leak by opening up the front of the dishwasher. Followed the instructions shown in https://www.youtube.com/watch?v=8kW4jkHln3k
2) Saw water inlet valve was leaking.
3) Found replacement valve on AppliancePartsPros.com and ordered. Received in three days.
4) To replace, follow instructions on https://www.youtube.com/watch?v=Yzz__LstyCA
5) Tested. Water leak problem resolved.