Bangkok Erawan Bombing suspects- could be 4 of them

Bangkok Erawan bombers ,there could be 4 suspects…
Watch closely the footage ,pay attention to 2 guys and girl and their actions
.
Red shirt guy n white shirt guy with him and black shirt girl acting very suspicious
Yellow shirt comes ,Red shirt stands up and yellow shirt takes his vacated seat
Then 2 guys and Black shirt girl block the view (body language of Girl suspiciously weird as if checking to make sure coast is clear )

Yellow shirt ,slips out of backpack with the bomb.
Giveaway ,may be when red shirt could not resist last minute side glance as he walks away,
Girl and other guy also gave more discreet last minute side glances.
Both guys left scene but body language of black shirt girl stiff and suspicious ,
as she left scene immediately followed by the yellow shirt guy..