A minister at a Pawtucket church has been charged with sexually assaulting an 87-year-old woman. The Rev. Rolando Rodriguez of the Light and Hope Methodist Church was arraigned Thursday on a charge of second-degree sexual assault in the incident, which prosecutors said occurred at the woman’s home on July 17. Prosecutors said Rodriguez came to the home unannounced, then grabbed the woman and pulled her to his body. Police say she then bit him. Defense attorney Robert Osteri said Rodriguez was simply hugging the woman to comfort her after the death of a loved one.