For residents of Puna, a remote and eclectic part of Hawaii’s Big Island , the killings of three men known for embracing the community’s off-grid, free-spirited lifestyle became a startling reminder of its struggles too. Nearly 24 hours after Jacob Baker was arrested, residents were struggling to understand what happened and were eager for answers on why authorities zeroed in on the 36-year-old as their suspect in the killings of the men who were all nearing or in their 70s. Baker remained jailed on suspicion of murder, burglary and other charges. Court records show Baker having repeated run-ins with police for a variety of offenses. And people who live in Puna told The Associated Press that their concern about Baker in recent days accelerated, portraying him as increasingly threatening.…