An 18-year-old Janesville man, suspected in a June 23 shooting at Bond Park, is in custody.  Janesville police say Dereese R. Fields was arrested Thursday at an apartment in Madison.  Authorities say a search warrant was written by Janesville Detectives and served by the Madison Police Department at an apartment in the 7900 block of Tree Lane.  Police say 18-year-old Thomdrecus L. Ross of Janesville was also arrested on charges related to an armed robbery in Sun Prairie.  Fields faces charges including First Degree Reckless injury While Armed after a 19-year-old man was wounded in the shooting at Bond Park.  Police say two handguns were seized during the arrests.