Riddle of courtesy.?

Question

2 detectives found an old man murdered on the beach. The man was lying on the ground, and the bench was blown to bits. The man was apparently the nicest man ever. He was very courtious, and a gentelman. He was the biggest gentelman around. One detective thinks it was a woman who murdered him. The other KNOWS it was a man. How does he know? ( It was a man. The answer I'm looking for is how does he know :) )

Answer 1

he didn't give up his seat.  cuz it was a guy

Answer 2

ummm because he was the biggest GENTALMEN around?

Answer 3

Because it was he who killed him

Answer 4

Because he was the murderer.