Mad as Helen by Susan McBride

Helen Evans must find a killer before her granddaughter is arrested for murder! When tiny River Bend, Illinois, is hit by a string of burglaries even Sheriff Frank Biddle can't solve, the clients of LaVyrle's Cut 'n' Curl can hardly talk of anything but. There are no signs of forced entry and no fingerprints, and valuables are missing from secret hiding places, as if the thief knew what he wanted and just where to look. Helen Evans wonders what the world has come to if even their once-quiet town isn't safe anymore. Then Grace Simpson, a big-city psychotherapist who had opened up shop in River Bend, is found dead on her bedroom floor, and Helen's granddaughter is caught with the murder weapon in hand. Sure of the girl's innocence, Helen embarks on a little investigation of her own and turns up plenty of folks who aren't grieving a bit now that Grace is dead …