My dad's retirement

KR recently told my children that my dad was fired from the fire department, and that the only job he could find was teaching at the penitentiary, and teaching inmates "how to be bad." Another attack on my family, for no reason, except to make the kids question their relationships with people they love.  I explained to the kids that grandpa retired from the fire department after working their for 26 years, and that the city policy was that after 25 years you were eligible to retire. Grandpa then went on to teach for the local community college. Yes, he did start teaching for their outreach at the penitentiary,  and he did that for a couple years and after that he taught on the college campus.  My dad went and got a letter from the city, explaining he retired, and a letter from the college that had the years he worked at the college and out at the penitentiary,  to show the kids.  He sat down and showed the kids. He told them there must have been a misunderstanding and he didn't want them to have to worry about what the truth was about him. The kids were relieved.  KR knew the truth. He chose to lie in attempt to make them think their grandpa was a bad person so that the kids would mistrust him. He had done this enough times over the last 5 years that we knew this was just another attempt to manipulate the kids and hurt them.