This is a link to Senator McCaskill's brief summary of the major provisions and highlights of CASA, her proposed bill. Note that this is coming from her Senate office, so understand that it may be biased in favor of CASA.
This is Senator McCaskill's basic "about me" page on her official website. The information is useful for understanding her background, and how her experiences as a prosecutor shaped her approach as a Senator. This information would be valuable to know when considering the possibility of working with Senator McCaskill on Title IX reforms or other legislation in the future.
This is a link to one of many articles opposing CASA, and arguing that it places investigations in the hands of the wrong people - universities - instead of law enforcement.
This is a link to an article arguing against CASA on the grounds of due process and legal protections. The author argues that accused students will be at a greater disadvantage in criminal trials and at a greater risk of punishment generally if CASA becomes law.