you people are too clever
this is my last puzzle i have on hand
There is a 
Mr. Black, a 
Mr. Green, a 
Mr. Red, and a 
Ms. Yellow.
They have a meeting in a mansion on a private island built for 
Mr. Green.
Their schedule is as follows.
][7:03 PM]The people all meet in front of the mansion, greeting each other.
][7:06 PM]The four people enter the mansion.
][7:10 PM] Mr. Black and 
Ms. Yellow are in the lounge, talking and drinking.
Mr. Red is in the library.
Mr. Green is in the hallway.
][7:15 PM] Ms. Yellow, 
Mr. Black and 
Mr. Green are in the library.
Mr. Red is in the lounge.
][7:35 PM] All of the members are gathered in the dining room.
][7:50 PM]Mr. Black, 
Mr. Red and 
Mr. Greenare all gathered in the lounge.
Ms. Yellow is upstairs.
][8:10 PM] All of the representatives are gathered in the library.
][8:20 PM] Mr. Green and 
Mr. Red are in the hallway.
Mr. Black's location is 
unknown.
Ms. Yellow's location is 
unknown.
Their location is 
unknown to 
Mr. Green and 
Mr. Red.
Mr. Red and 
Mr. Green found 2 locked rooms.
One was a room belonging to 
Mr. Black. The other one to 
Ms. Yellow.
They discovered 
Mr. Black in his room, dead. They discovered 
Ms. Yellow in her room, also dead.
Ms. Yellow was shot once in the head.
They found keys to the rooms on their persons. However...
The key to 
Ms. Yellow's room was found in 
Mr. Black's pocket.
The key to 
Mr. Black's room was found in 
Ms. Yellow's pocket.
Both doors were locked at the time of the discovery. 
They can only be locked and unlocked by their respective keys.
They had to be broken down to enter the rooms.
At least one of the two men who found the bodies is innocent.
Ms. Yellow's death was a murder. Mr. Black's death was a murder.
Who committed the murder of Mr. Black
? Who committed the murder of Ms. Yellow?Ask any question, gather information. Think detective.