The push for a more transparent Boston Police Department was one of the hallmarks of Marty Walsh’s second term. But now, as Walsh gets ready to head to Washington, his pick to run the BPD — Commissioner Dennis White — is on leave as the city investigates domestic-violence allegations that surfaced after his appointment. In this episode of the Scrum, Saraya Wintersmith updates Adam Reilly on the status of that investigation and how the various candidates hoping to replace Walsh are addressing (or avoiding) the White controversy. Plus, Zoe Mathews talks with Somerville Journal reporter Julia Taliesin about Joe Curtatone’s impending mayoral exit and the electoral landscape his would-be successors will navigate.