Ariz. - Faculty and staff are in mourning after a University of Arizona professor was allegedly shot and killed on campus by a former graduate student.According to court documents, Dervish made several impromptu statements before being interviewed by police, including "I hope he's okay, probably wishful thinking," and "I just felt so disrespected by that whole department."The last time she saw Meixner, who was a big supporter of Native American and indigenous communities researching water issues, was a week ago at a seminar his department co-sponsored.He was just so kind and positive and always wanting to help," said Chief, who noted that Meixner never mentioned to her if there had been any trouble with a current or former student.He recently retweeted the following quote, ‘Hope is not optimism, which expects things to turn out well, but something rooted in the conviction that there is good worth working for.’ Tom certainly lived this."