we find out who he is, sammy wallace. we start doing a criminal background check and see if anyone is familiar with him. he has a pair of sunglasses on. he throws them on the ground. >> while negotiators engage wallace, zoe's mother is frantically pleaded for his daughter. >> he wouldn't listen. he wouldn't put the knife down. i put my hands down and said in jesus name save my baby. please save my baby. >> she is agitating the situation and had to force her from the scene for her protection and the protection of zoe. we wanted to negotiate it in to a peaceful end. her daughter is taken out of the store. wallace is increasingly erratic and exhibits signs of mental illness. >> he is talking about illuminoty which is a group that talks about conspiracy theories. he feels like the government is watching him and indicates that president bush has been watching him. and he continues to ask us to call kevin, this dallas police officer. so we actually get ahold of kevin and kevin doesn't know mr. wallace only knows he has his naub

we retrieve his wallet, we find out who he is, sammy wallace. we start doing a criminal background check and see if anyone is familiar with him. he has a pair of sunglasses on. he throws them on the ground. >> while negotiators engage wallace, zoe's mother is frantically pleaded for his daughter. >> he wouldn't listen. he would not put that knife down. i went into extreme panic mode. i said, i have to be praying. i put my hands in the air and said, in jesus' name, save my baby. please save my baby. >> she is agitating the situation because she's a loving mother. we had to forcibly remove her from the scene for her protection and really for the protection of zoe. we wanted to negotiate it in to a peaceful end. keating's 12-year-old daughter is also taken out of the store. wallace is increasingly erratic and exhibits signs of mental illness. >> he is talking about illuminati, which is a secret group which was formed several hundred years ago that talks about conspiracy theories. he feels like the government is watching him and indicates that presid