Karen closed her accounts, only to have the criminal crack open the new ones she'd opened and drain those too.
Before this sentence, the passage stated that a criminal stole Karen's purse, which contained her ID card and some credit cards. Then the criminal used the credit cards to scam thousands of dollars from her.
So what does "crack" mean here? Is it a verb or noun? I feel it should be something like "deceive", but I cannot find a proper definition in my dictionary. If it is a verb, how do I interpret the word "open" after it? Does the word "crack" have some such use as crack do sth.? If it is a noun, what's the exact meaning of it? Thanks.