lisa mcelroy , 50 , who teaches legal writing at drexel university , reportedly sent the ` inappropriate ' message on march 31 .
when recipients clicked the enclosed link , they were allegedly directed to a video of ` a woman engaging in a sexually explicit act '
david lat - a lawyer and legal commenter - suggests that the professor could have been ` hacked ' or made a ` copy/paste error '
along with teaching law , mcelroy is also an accomplished author with a number of published biographies and children 's books .