Question

RIDDLE :
A HISTORY TEACHER WAS KILLED IN HER ROOM . WHILE DYING SHE WROTE A CERTAIN NUMBERS ON THE CALENDAR : 1,4,9,10,11
THE POLICE FOUND FOUR SUSPECTS: JASON (HER NEPHEW), MARY (HER SISTER), NICOLAS (HER HUSBAND ), DAVID (HER STUDENT)
THE NEXT DAY POLICE ARRESTED THE CULPRIT .
CAN YOU TELL WHO WAS THE CULPRIT AND HOW?

Answer 1

1,4,9,10 and 11 are the sequence of the months of year
1-January
4-April
9-September
10-October
11-November
If we take the first letter of every month, it will be 'JASON'

Answer 2

the culprit is Jason .
1 - january 
4 - april
9 - september
10 - october
11 - november
when we take the first letter of all the months we get JASON