 As the agents are on their way to intercept her , B.J. attacks Thibedeaux , but stops when she sees the " Sister " scars on her chest . The agents find Thibedeaux after B.J. has left , and head to Cokely 's house , believing him to be her next target . B.J. , who has already arrived , cuts Cokely 's respirator tubes and attacks him with a razor . When the agents arrive B.J. attacks Mulder but when Cokely finally dies she stops . B.J. is placed in Shamrock Women 's Prison Psychiatric Ward where she is put on suicide watch after attempting to self @-@ abort . 
