so melissa allen has turned to another inmate, megan dooley, for help.ou add 6 to 18 and it gives you the next answer. >> it's great. i'm not embarrassed when she helps me. i sit there and listen to her because i know shy ain't judging me and stuff. >> i treat people how i want them to treat me. math is one of my better skills. it comes easy to me. so something that she struggles with, that's easy for me, if i can help her with it, it's not going to hurt me to sit down for ten minutes and write out the multiplication tables. all i have here is time. why not use it for something constructive? 30, 40, 50 -- >> yes, okay. >> melissa sees learning math as a step toward getting her life back on track after years of drug addiction and prostitution. >> monday through sunday, nonstop, every day. there's not a day that passed, every day. i did crazy -- i looked like a damned fool. i could see myself out there. i looked like a damned fool, running around thinking i'm like [ bleep ]. probably smelled like one, i don't know. 37 years old. i can't do this no more. i

. >> during the boston series, we told the story of melissa allen, and how her struggles with drugs led to a host of problems for her and her family. >> all this is the dirty work. walk the street, sell drugs, do all that. a couple streets down, that's where i live. and they've put me in a room i can see everything i did. >> but inside suffolk county, melissa was striving to improve her life, in part, by studying for her g.e.d. that's how we met megan douly. she was voluntarily tutoring melissa. >> ten times number? you add a zero to a number. 10. >> 30, 40, 50, 60 -- >> yes. easy. >> she doesn't know the multiplication tables. i do. that's something i excelled in when i was in school. i have a job as a bookkeeper and everything else. so math is one of my better skills, you know. >> when we asked megan about why she wanted to help melissa with her schoolwork she had told us it was because of her father. he influenced her to want to help people and do good and she was able to find a way to do that inside the jail. >> he was sober for 18 months when he died and i used to just watch him at

>> police catch deric allen. melissa and her baby daughter are both safe. >> she could have been killed. i mean, without question. if she didn't stay on that phone, absolutely, she could have been killed. >> when melissa's dad first hears the 911 call, he's overwhelmed with emotion. >> i've never heard anything like that in my life. i picture her laying on that bed, with this maniac on top of her. you can only assume what might have been happened, but it wasn't going to be anything good. >> in the courtroom, margalia says allen appears to have no remorse, and hearing his daughter's voice on that heart-wrenching 911 call again is too much. >> i just said, the hell with it. and i tried to reach him. and unfortunately, i didn't. i came within probably a foot or so, and got tackled by this middle linebacker bailiff there. he hit me around the waist and i fell to the ground and he was on top of me. so, i could picture myself really doing some serious harm to him, so maybe it's a blessing i didn't. >> in 2008, deric allen is f

melissa. what's the latest with the roads? >> look at this, we have the chopper over this. kemp hill road shut down at glen allen. poles and wires are down. pepco is on the scene. 70 westbound at east patrick, a ramp shut down because of the crash. 270 south not looking bad at all. top of the beltway there again, on time here this morning. 66 inbound, no problems 95 north quantico to the beltway ten minutes behind. remember to listen to our friends on wtop for the latest on traffic when you hop in your car. eun? >>> i'll take it, melissa, thank you. we are live in baltimore where we are seeing the beginnings of the investigation and the clean-up effort. we'll tell you more about what this accident on amtrak is -- the impact it's having on train >>> breaking news this morning out of philadelphia. you are looking live from above the city above an amtrak train derailment that happened about 9:30 last night. you can see the mangled mess the train cars have left here as they lie on their side in some cases. sometimes on their roofs. the engine of the train separated from the rest of the cars as well here when this acc

allen. what's expected today in baltimore? >> well melissa the next couple of hours. it's a demonstration, protest, victory, rally it's any number of thins but very upbeat which is very striking about this. the police presence is very relaxed, no tension at the moment. there were a few arrests for curfew violations but almost like a -- it's been very well choreographed. a number of protesters stayed out late past 10:00, but by 10:45, 11:00 t streets were cleared. it's only happening in a couple of small areas of the city. things are moving peacefully. because of the very furious and sweeping charges leveled against the six officers. imagine what it would be if that had not happened. things are much more upbeat and positive going forward today. the event today is about a lot of things. one of the issues of police brutality. one of the issues is the freddie gray case. when you talk to activists here there's a whole range of things that they're trying to focus the public on now that they've got momentum and a big victory, they would call it. i t