WEST BROOKFIELD, Mass. — Police have charged a Massachusetts man with misleading investigators as they searched for answers in the killings of a mother and her three young children.Court records show 31-year-old Mathew Locke, of Ware, told investigators he had been in contact with the husband of Sara Bermudez. Bermudez and her children, Madison, James and Michael, were found dead March 1 in their West Brookfield home.Police documents show Locke told investigators Moses Bermudez made statements implying the gang MS-13 was responsible for their deaths.