I believe he is the shooter.
33 years
http://www.denverpost.com/ci_13974464
“Peterson, who walks with difficulty but no longer uses a wheelchair, spent 10 weeks in the hospital recovering from two fractures in his upper neck; a broken pelvis, femur and hand; and broken ribs.”
http://archive.9news.com/news/story.aspx?storyid=121703&catid=339
mike peterson
https://www.linkedin.com/in/mike-peterson-25525415?trk=seokp-title_posts_secondary_cluster_res_author_name
http://www.denverpost.com/news/ci_27396405/jeffco-sheriff-shoplifting-duo-threatened-employee-had-child