. >> reporter: college sophomore tiaja farrelly is the youngest in the class. >> kicking my tail. i don't have an outside life. it's all the school events. i miss having fun with my friends, birthdays, all type of celebrations. >> reporter: almost all of her time is dedicated to making it as an officer. >> it's so important for me to work out because i might be tackling somebody someday. got to stay fit. >> hello, sir. >> you don't know what somebody else is going through. >> can i get your license and insurance please, sir? >> i just got off of work, i'm just trying to go home. >> that day, you talking to them could be their worst day. >> reporter: black women are among the most underrepresented groups in policing, making up 2.7% of the force nationally. >> i never saw a black female police officer growing up. i am kind of proud of myself, actually, that i could be like the face and the voice for girls like me. like yes, you could do this. we've just got to push forward and do what we want to do, don't let nobody stop us. >> how can you be something you can't see? >> exactly. tha