Re: Bank teller stole $28,000 from customers to feed her gambling addiction
Satoshi has successfully been completely anonymous for 15 years and still counting, yet no one able to catch him. 
The bank teller hasn't completely know how the banks works, that's why someone can caught him since he not able to erase all of the trace. It's why if you're not a developer and understand about cyber security, never ever do something risky.
You will get caught sooner or later.
You can ask a bank teller or even a manager if it is possible to erase transactions. Bank tellers are not programmers, their jobs are just to register transactions and give and receive cash. For them to issue cash in most cases, they need to seek approval from the supervisor. Most banking transactions are handled by third parties service providers which makes it difficult to erase transactions. The bank teller hasn't completely know how the banks works, that's why someone can caught him since he not able to erase all of the trace. It's why if you're not a developer and understand about cyber security, never ever do something risky.
You will get caught sooner or later.
Don't forget that customers will also get notifications for transactions that are carried out on their accounts. It will take a coordinated operation between many staff in the bank and other service providers to erase transactions. The reason why the banker in OP's story was able to hide the crime for a long time was because her target was physically and mentally sick elderly people. In summary, don't ever assume that it is easy to erase transactions from bank systems because they are complex and also well secured.