I'm not saying what they did was right, but people make mistakes and I'm glad they found out what was wrong with your dad Lee. I know you're angry and frustrated but it's good they found out what was wrong.
Not trying to be disrespectful or anything, just offering another point of view. We're tight you know that!! :D
I couldn't stress more of what schmange said. Always trust your instincts and if you think something is wrong besides what they tell you, get another opinion. Sometimes it's your life that's at stake.
Sometimes I hit notes only dogs can hear.