Bobby Allyn looks into a former Penn professor’s release from jail. Host Dave Heller speaks with Drexel law professor Richard Frankel about a letter signed by professors across the country disapproving of Trump Attorney General pick, Jeff Sessions. Katie Colaneri reports on Philadelphia’s soda tax after one week of implementation. Anne Hoffman looks into research on Latino immigrants and their mental health in states with exclusionary policies. Peter Crimmins brings the story of a rock opera inspired by Lizzie Borden. In this week’s edition of SkyTalk, Dave Heller speaks with Derrick Pitts, chief astronomer at the Franklin Institute, about the search for Earth-like planets.