( CNN ) -- Four police officers fatally shot in a Washington coffee shop last month were `` the best of who we can be , '' Washington Gov . Christine Gregoire told thousands of people gathered at the officers ' memorial service on Tuesday . Nearly 20,000 people -- mostly police officers from across the United States and Canada -- attended the service in the Tacoma Dome in Tacoma , Washington , CNN affiliate KIRO reported . `` Sgt . Mark Renninger [ and ] officers Tina Griswold , Ron Owens and Greg Richards were the best of who we can be : Dedicated leaders and citizens who cared for their community , '' Gregoire said at the service . The Lakewood police officers -- Renninger , 39 ; Griswold , 40 ; Owens , 37 ; and Richards , 42 -- were fatally shot November 29 in a coffee shop near Lakewood by an Arkansas parolee with a lengthy criminal history , police said . The suspect , Maurice Clemmons , 37 , was shot dead by a Seattle , Washington , police officer two days later after a manhunt that stretched across the Seattle and Tacoma areas . Before the service Tuesday , a procession of thousands of police vehicles went from McChord Air Force Base to the Tacoma Dome , taking several hours to complete , KIRO reported . In the dome , colleagues and relatives took to the podium to recall the fallen officers , each of whom had children . KIRO : Local coverage of memorial . Renninger was recalled as a dedicated SWAT member who loved NASCAR . Owens and Griswold were remembered for their love of motorcycle rides , and Richards for jamming with a band . `` If these officers were here this afternoon , to an officer they would tell you , 'On November 29 , I was doing my duty . ' And there is no higher calling than to do one 's duty , and they served well , '' Lakewood Mayor Doug Richardson said . Five people , including a man who identified himself as Clemmons ' half-brother and neighbor , have been charged on suspicion of helping Clemmons elude police after the shooting , according to court documents .
Memorial for four Lakewood , Washington , police officers killed in Tacoma . Nearly 20,000 people -- many of them police officers -- attended , KIRO reports . Police officers who say , ` ` I was doing my job , '' mayor says . Officer fatally shot in coffee shop on November 29 .