I felt I was threatened bullied and racially targeted by my manager human resources and their residential manger because I took time for my son fmla

The employer cannot take actions against you based on race, and cannot retaliate against you for requesting or taking FMLA leave.  Your question does not provide enough facts to determine if the employer's actions were based on one of these illegal motives.  If you were out of town for a weekend while you were taking FMLA, this would not necessarily be a problem as long as this did not conflict with your medical need for FMLA.  It seems that the information that the employer is seeking is related to that inquiry. You should meet with an employment law attorney to review your case in more detail