ggggcc repeat Riddles

I say everything I hear to others around. I'm not an animal, nor part of the human race. I will, immediately, repeat after you; But only if my tail is in place. What am I?

A pet shop owner had a parrot with a sign on its cage that said "Parrot repeats everything it hears". Davey bought the parrot and for two weeks he spoke to it and it didn't say a word. He returned the parrot but the shopkeeper said he never lied about the parrot. How can this be?

A young man entered a pet shop in search of a talking parrot. On one of the cages, he saw a sign saying, "This parrot repeats everything it hears." The man bought the parrot and tried to teach it to speak. Yet, he was unsuccessful. The bird didn't say one word in over 2 weeks. So the man decided to return the parrot and accused the shopkeeper of lying. However, the shopkeeper insisted that he was saying the truth... How is this possible?

A dead body is found at the bottom of a multistory building. Seeing the position of the body, it is evident that the person jumped from one of the floors, committing suicide. A homicide detective is called to look after the case. He goes to the first floor and walks into the room facing the direction in which the body was found. He opens the window in that direction and flips a coin towards the floor. Then he goes to the second floor and repeats the process. He keeps on doing this until he reaches the last floor. Then, when he climbs down he tells the team that it is a murder, not suicide. How did he come to know that it was a murder?