Bristol prosecutors must show that a cousin of Aaron Hernandez can receive adequate medical treatment in jail if they plan to seek incarceration for her, a judge ruled Wednesday. The ruling was issued in the case against Tanya Singleton, 38, who is being treated for cancer. She is scheduled to plead guilty to a contempt charge Tuesday in Bristol Superior Court in Fall River. Singleton allegedly refused to testify before a grand jury hearing evidence in a slaying June 2013 that Hernandez, the former New England Patriots star, is charged with committing.Travis Andersen can be reached at email@example.com. Follow him on Twitter @TAGlobe.