Here is the full statement from MARTA officials:

"MARTA police were notified about this video last Friday and launched an immediate and aggressive investigation into the incident. After canvassing the East Lake Station where the suspect reportedly exited the train, we received an anonymous tip that this incident possibly occurred on March 31, 2008 between the hours of 2:00 p.m. and 4:00 p.m. The tipster also indicated the suspect has been known to ride Bus Route 22. MARTA police were able to positively identify the individual allegedly involved in this incident and have secured a warrant for her arrest."

"We want to assure the public that this is an extremely isolated incident and that customer safety and security are our highest priorities," stated MARTA Chief of Police Wanda Dunham. "We regret that any customer had to endure such harassment while using our system. I also wish the many citizens who witnessed this incident would have contacted the MARTA police so that we could have responded to this situation immediately. We are asking that anyone who witnessed this incident please come forward to provide additional first hand information, which may lead to additional charges against the suspect. If you have any information about this incident, please contact MARTA Police Detectives at (404) 848-4911."

"MARTA police officers regularly patrol the trains and are available at rail stations to provide assistance. Emergency call buttons are also located in all rail cars, which go directly to the rail operator in case customers need to request immediate assistance. Customers can also reach MARTA Police communications directly by dialing (404) 848-4911 or by pressing #MPD on any AT&T, Verizon, or Sprint/Nextel cellular phone. Blackberry users press #673."