Yeah, i think he shook her and than took a pillow or something and smothered her as well.
Actually, imo, he is a sociopath, was on the meds the police stated were prescribed to him that they found on the kitchen counter, was VIOLENT by nature (note his psychiatrist, michael's psychiatrist who called the Schindler's to WARN them of Michael's potential for violence and to call 911 immediately) and, to me, this SAYS, MICHAEL SCHIAVO BEAT THE LIVING YOU KNOW WHAT OUT OF TERRI.