Answer: The sentence was not properly written, because it contain dangling construction.
Explanation: This sentence was poorly constructed because while constructing a sentence we should be careful with starting with verb that ends with 'ing'. In this case "Tripping " is a dangling modifier. A dangling modifier occurs when a statement does not have a clear subject.
The correct statement should have been "while the thief was escaping he tripped at the entrance of the bank, the money dropped before he left the crime scene.
