Jason McCubbins, Ray's business partner did it.
The calendar is the clue to solving this murder. The police realized that since Mr. Whitcombe was wearing his watch on his right arm, he must be left handed. But the pen was found in his right hand. Realizing that the number on the calendar was written in a hurry and with his opposite hand, police matched the written number with the months of the year. So the B was an 8, thereby giving us 7-8-9-10-11: July, August, September, October, November. Use the first letter of each month and it spells J-A-S-O-N.

And for another one...

A woman walked into an office building, looked at the guard, and said her name was Jenny. The next day she walked into the same building, looked at the same guard and said her name was Julie. On the third day yet again she walked into the same office building and announced to the same guard that he name was Jodie. What is going on?

The woman has Multiple Personality Disorder. This happens when a traumatic experience causes so much pain that they make another personality to cope with the situation.

Now for a little easier one...

How many times can you subtract the number 5 from 25?

How many times can you subtract the number 5 from 25?

Only once after that the number is 20.

Now for a CSI style mystery...

Dave and Brad, two popular politicians, met at a club to discuss the overthrow of their party leader. They each ordered a vodka on the rocks. Brad downed his and ordered another. He then drank his second in a gulp and decided to wait before he ordered a third. Meanwhile, Dave, who was sipping his drink, suddenly fell forward dead. Both men were setup for an assassination. Why did Dave die and Brad live?

Both Dave and Brad were given drinks with poisoned ice cubes. Brad drank his drinks so quickly that the ice didn't have time to melt and release the poison.

OK figure me this one...

If you divide thirty by 1/2 and add 10 what would you have?

30 / .5 = 60 + 10 = 70

OK this one should be a bit more difficult...

Grandma has an old-fashioned refrigerator with a very small freezer compartment which can hold up to seven ice cube trays stacked, but there are no shelves to separate the trays. You have fifteen trays, each of which can make a dozen cubes, but if you stand one tray on top of another before it's frozen, it will sink into the lower tray and you won't get full cubes from the lower tray. Without using anything but water and the ice cube trays, what is the fastest way to make full ice cubes in seven trays?

This can be accomplished by using frozen cubes as spacers to hold the trays apart. In the time it takes to freeze two trays, seven trays of ice can be frozen. Fill one tray, freeze it and remove the cubes. Place two cubes in the opposite corners of six trays, and fill the rest with water. Freeze all six trays, plus the seventh tray which is on top.

There is a certain with both girl and boy children. Each of the boys has the same number of brothers as he has sisters. Each of the girls has twice as many brothers as she has sisters. How many boys and girls are there in this family?

Four boys and three girls.

Ok here is a bus riddle...

There is a bus full of people traveling through San Francisco and no one gets off the bus throughout the journey. But when it gets to the other side there is not a single person left. How is this possible?