brad met dave ruenzel when he with moved from r his family tolbay area 20 years ago. >> nationally known educational writer and he and i would go hiking a lot. >> reporter: a hike is the last place anyone thought ruenzel would be in danger, but tuesday afternoon he was found shot dade on a park trail in the huckle berry preserve, part of the bay area regional bay system. >> witnesses described two men on the trail before the gunshots, and have released these composite sketches. they believe rob we was motive, but those who know ruenzel sid say at most he had a phone and wallet on him and rarely carried cash. >> he was jump a warm, gregarious guy, every time i think of him i smile. >> i just broken down in his wife's arms. so he was -- he another long time friend who often walked with ruenzel points to the facebook page full of remembrances from ruenzel's former students describing him as quirkry, inspiring and brilliantment he spent a decade teaching newspaper partner journalism in danville and after leaving the classroom wrote for national publications and the gates foundation. >> he wa