As usual there's conflicting information across the tabloids - one article I read suggested that the 2 men were in no hurry to flee the scene after post office staff rang the guards, and were questioned for a couple hours before being let go - another similar and equally thrash paper said they immediately fleed the scene after dropping the body and police are hunting for them. Both agree that the men claimed the guy was having a heart attack when staff became suspicious so it's either they laid him down after the claim and waited for medics to arrive or they dropped him like a hot potato and legged it. I'm guessing the latter. The shop was packed at the time as many collect their social welfare at that time on a Friday afternoon, witnessing that would stick in yer head for a bit!