Murder in the Gunroom by H. Beam Piper

It was raining again as Rand parked his car about a hundred yards up the street from Karen Lawrence's antique-shop. The windows were dark, but Karen was waiting inside the door for him. He entered quickly, mindful of the All-Seeing Eye across the street, and followed her to a back room, where Mrs. Jarrett and Dorothy Gresham were. All three women regarded him intently, as though trying to decide whether he was friend or enemy. There was a long silence before Mrs. Jarrett spoke, and when she did, her words were almost the same as Karen's when she had spoken over the phone.

"Colonel Rand," she began, obviously struggling with herself, "you must tell me the truth. Did you have anything to do with my son's being arrested?"