The former mother-in-law of Orlando office building shooting suspect Jason Rodriguez -- identity withheld -- tells Fox News “he was a very unpredictable person… he would imagine things sometimes.” She also admitted her ex-son-in-law was in a mental institution earlier this year. She added J-Rod is paranoid and has “mental problems” and was under medication for “control of the brain”. In addition, her daughter was so scared “she had to go to work with her face down… He was crazy.” When he …