Getting away with a bank robbery in today's day and age is very unlikely bit it can be possible as there are some bank robberies that go unsolved and the person was never caught.
But even if you get away with the bank robbery today you could still be caught eventually and charged with the bank robbery years later and still end up in prison for 15 to 20 years.
There was a bank robbery case in the paper years ago and the robber wasn't caught right away but then 10 years later they finally caught up to the bank robber as someone out of state read online about it and spotted the bank robber in their state and contacted authorities and then bank robber was then caught.
Robbing a bank is never worth it and at most they get $4,000.00 but sometimes less during the bank robbery and most bank robbers are caught within the same day or the next day.