Comments by a UC Davis English professor several years ago reportedly saying he believes police officers “need to be killed” have gained attention since the shooting death of Davis police Officer Natalie Corona. Joshua Clover, a professor of English and Comparative Literature, tweeted in 2014, “I am thankful that every living cop will one day be dead, some by their own hand, some by others, too many of old age #letsnotmakemore,” according to UC Davis’ college newspaper The California Aggie. On his now-private Twitter account, he also reportedly tweeted, “I mean, it’s easier to shoot cops when their backs are...