from RC Park: "On July 12, 2014, at approximately 6:44 a.m., deputies from the Rancho Cucamonga Police Department responded to a report of two mountain lions jumping from back yard to back yard in the 8800 block of Somerset Drive. This urban residential area is close to Beryl Park and the 210 Freeway. Deputies searched the area and saw a mountain lion scale a fence and bound through several backyards. The deputies requested the assistance of Rancho Cucamonga Animal Control and the California Department of Fish and Wildlife. The deputies warned residents to stay indoors while they searched the neighborhood. At 7:25 a.m., a homeowner in the 6300 block of Moonstone Avenue reported a mountain lion was in the backyard of the residence. Deputies and animal control officers responded and located an adult mountain lion in a corner of the yard. The responding public safety personnel maintained a respectful and non-threatening distance to observe and assess the animal. Based on the imminent threat to public safety; at 8:19 a.m., a deputy humanely shot the mountain lion. The animal expired of the single gunshot wound immediately and a Necropsy will be conducted."

(source: http://www.cityofrc.us/news/displaynews.asp?NewsID=726&TargetID=3) 

this has to change make the RCPD learn how to use traqulizer dart guns and send them back into the wild.