Latest developments: Police issue message -- "call us back." Two men questioned may be unrelated to case. Saturday's shooting linked to sniper. news_sniper_vancustody_1021_abc.jpg home Sniper Updates http://www.abcnews.go.com/sections/us/videofiles/video/streamer6_video_r1.ram 10352110314230 abcnews.gif video.gif http://abcnews.go.com/sections/us/videofiles/Video/021021sniper_video.ram 10352110314231 Latest Video Update lock_icon.gif video.gif lock_icon.gif lock_icon.gif big_headline