SOLVE THE CASES IF YOU CAN

Case - 3 the bomb blast
New year came , now everyone is is free
now most of the people are in shopping malls.
Today you have the case of bomb blast in a mall,
most of the people are dead there ,now you have to give them justice
you have to find the people who has placed the bomb to the mall,
so you go there and find out that there are still 5 people who are alive,
the cleaner, two body guards, the owner of the mall and a woman
You 1st go to the women and ask her where she was during the bomb blast, and how she is still safe??
She answered that when she got of the mall , the mall exploded
then you asked the same question to everyone,
the cleaner said that he was cleaning the bath room before the incident,
the body guards said they were guarding outside,
and the owner shouted at you ,he said , why would he destroy his own mall.
After the statements you went to the mall for investigation
you found nothing special

Who are they?? Who placed the bomb??
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