Officer Greenwalt has been serving the WPD since November 2002 .  Before coming to WPD, he served as a paramedic with MAST Ambulance in the Kansas City Metro area.  He is a member of the Special Emergency Response Team (SERT).  Officer Greenwalt and Uno make up the WPD Canine Team.

Uno is a purebred German Shepard imported from Europe.  He arrived at Castle K-9 in Mechanicsburg, PA in January 2005. Officer Greenwalt and Uno  trained and certified together at Castle K-9.  Uno is trained and certified in tracking, narcotics and officer protection.  All of Uno’s commands are in the Hungarian language.