The Case of the Murder at the Nudist Colony

Detectives Davis and Moreno were driving down the road on their way to another crime scene. They soon turned off the road and passed a sign.
“Why do you suppose they call this place the Bear Island Nudist Colony?” Moreno asked. “There are no bears there and it’s not an island.”
“Somehow it seem appropriate, I guess,” his partner replied.
The policemen made their way through the camp on foot. Several times they were distracted by the skimpy attire of the guests.
“I must say that this takes some getting used to,” Moreno remarked as he stopped to watch several young women playing a game of beach volleyball. “But I could do it!” He smiled shyly at the ladies.
“We’re on duty now,” Davis reminded him. “I know it’s not easy, but don’t make it hard for yourself. Let’s just get the job done.”
The detectives passed several attractive sunbathers on their way to the main building. They tried very hard not to stare. They passed by the gym, where several young women were doing aerobic routines. Finally, they made their way to the game room, where they met Officer Rogan.
“Good afternoon, officer,” Moreno said. “We’re here for the investigation. Can you give us any nudes, oh, I mean news?”
“The body is over here,” Rogan replied as he pointed to the right.
The policemen looked at the woman on the floor. She appears to have one large wound on the front of her head.
“A cowardly act of naked aggression,” Moreno commented. “We will certainly try to expose the perpetrator of this crime once and for all.”
“If they aren’t exposed already,” Davis added. “At least we won’t have to worry about dealing with suspects who might have concealed weapons, will we?”
The detectives went about questioning several people in the area as to whether or not anyone saw anything connected with the murder.
“Marilyn is dead? How awful!” Ima Flirt exclaimed. “I’m sorry I don’t know anything about it.”
“There was a murder? Omigod!” Yelled Harold. “Sorry I didn’t see anything. I’ve been too busy watching the women!”
“Someone was murdered? That’s terrible,” Roy the maintenance man said. “No, I can’t help. I was in the tool shed working on the lawnmowers all morning.”
“Oh, I think I’m going to cry,” Miss Undress broke down when she heard the news. “She was such a sweet lady. Who would want to do such a thing? Where was I? I just got up from my nap.”
“Marilyn was killed? How sad,” Mr. Wang said. “Yes, I knew her. We were good friends. I hadn’t seen her today.”
“Somebody died? Geesh!” Mark the athletic instructor remarked. “That’s the first I’ve heard of it. No, I don’t know. I didn’t see anything in the gym where I spend most of my time.”
“I think we have a suspect,” Davis said.

WHO DID DAVIS SUSPECT?
THE ANSWER
He suspected Roy. Roy had an alibi for that morning, but Davis never actually said when the murder took place. As the maintenance man, he was also the only one who had access to various tools which could be used as weapons. Further investigation turned up evidence against him.