ABC:
Retired Laurel Police Chief...faces multiple arson charges after authorities say he's responsible for a series of fires set across Maryland, at the homes of family members and police officials, over the course of nine years.
...
According to the department, people were inside the home during six of the blazes.
Fox:
Investigators were able to make a break in the case when they discovered a link between the victims. In each case, the victims had some kind of disagreement with [the former chief] in the past.