The police captain said authorities do not know how the suspect learned details of the victims , speculating it may have been over the Internet , by accessing an old directory or noticing would-be victims with Delta Sigma Theta jewelry , placards or other paraphernalia out in public . Texas , Plano , police distribute composite sketch of the sexual assault suspect . four women in their 40s were allegedly attacked while at home alone , police say . They were all alumnae of the Delta Sigma Theta sorority . The alleged attacker , black and in his 30s or 50s and 60s , knew personal info about his victims .
Texas , Plano , police distribute composite sketch of the sexual assault suspect . four women in their 40s were allegedly attacked while at home alone , police say . They were all alumnae of the Delta Sigma Theta sorority . The alleged attacker , black and in his 30s or 50s and 60s , knew personal info about his victims .