brian davidson supervised the detective division. >> any risk markets in her life?ng you found that could have led her down this path at all? >> no, that was the thing, she was a brilliant student. she was getting ready to graduate. i mean, she was just a great kid. >> i can remember the detective asking me, is there anybody that you know of, that would have wanted to hurt her. and i can remember, i was just like, why are you -- no, why would anybody want to hurt her? everybody loved her. >> makenzie could see that too. >> when i went to apply for my first job when i turned 16, i walked in there, and said my last name. he was like, my sister worked for you last summer, and he's like, you're hired. >> reagan spent free time spending mission trips for her church. >> she knew she would be able to have a positive impact to make a difference. >> you must have been like, i'm just so proud of her. >> we were. she had a gift, and she would have done anything she set her mind to. >> at osu reagan's roommates say she was all about making friend, not enemies. >> she said that