If all the below statements are true

1. Gianni was either in Italy or France in 1997.
2. If Gianni did not kill Versace, Hilton must have killed him.
3. If Versace died of suffocation, then either Gianni killed him or Versace committed suicide.
4. If Gianni was in Italy in 1997, then Gianni did not kill Versace.
5. Versace died of suffocation, but he did not kill himself.

Who killed Versace and where was Gianni in 1997?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What came first, the chicken or the egg?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

What is harder to catch the faster you run?

What number do you get when you multiply all of the numbers on a telephone's number pad?

I am quite hot but become too cold if you remove the first two letters. What am I?

By what process could you make a 'Tea-Table' into food?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?