Detective Geyer reopened his search in Indianapolis by obtaining a list of advertisements of houses to let in the city in 1894. Nine hundred of these were followed up in vain. He then turned his attention to the small towns lying around Indianapolis with no happier result. Geyer wrote in something of despair to his superiors: "By Monday we will have searched every outlying town except Irvington. After Irvington, I scarcely know where we shall go." Thither he went on August 27, exactly two months from the day on which his quest had begun. As he entered the town he noticed the advertisement of an estate agent. He called at the office and found a "pleasant-faced old gentleman," who greeted him amiably. Once again Geyer opened his now soiled and ragged packet of photographs, and asked the gentleman if in October, 1894, he had let a house to a man who said that he wanted one for a widowed sister. He showed him the portrait of Holmes.
The old man put on his glasses and looked at the photograph for some time. Yes, he said, he did remember that he had given the keys of a cottage in October, 1894, to a man of Holmes' appearance, and he recollected the man the more distinctly for the uncivil abruptness with which he had asked for the keys; "I felt," he said, "he should have had more respect for my grey hairs."
From the old gentleman's office Geyer hastened to the cottage, and made at once for the cellar. There he could find no sign of recent disturbance. But beneath the floor of a piazza adjoining the house he found the remains of a trunk, answering to the description of that which the Pitezel children had had with them, and in an outhouse he discovered the inevitable stove, Holmes' one indispensable piece of furniture. It was stained with blood on the top. A neighbour had seen Holmes in the same October drive up to the house in the furniture wagon accompanied by a boy, and later in the day Holmes had asked him to come over to the cottage and help him to put up a stove. The neighbour asked him why he did not use gas; Holmes replied that he did not think gas was healthy for children. While the two men were putting up the stove, the little boy stood by and watched them. After further search there were discovered in the cellar chimney some bones, teeth, a pelvis and the baked remains of a stomach, liver and spleen.
Medical examination showed them to be the remains of a child between seven and ten years of age. A spinning top, a scarf-pin, a pair of shoes and some articles of clothing that had belonged to the little Pitezels, had been found in the house at different times, and were handed over to Geyer.
His search was ended. On September 1 he returned to Philadelphia.
Holmes was put on his trial on October 28, 1895, before the Court of Oyer and Terminer in Philadelphia, charged with the murder of Benjamin Pitezel. In the course of the trial the district attorney offered to put in evidence showing that Holmes had also murdered the three children of Pitezel, contending that such evidence was admissible on the ground that the murders of the children and their father were parts of the same transaction. The judge refused to admit the evidence, though expressing a doubt as to its inadmissibility. The defence did not dispute the identity of the body found in Callowhill Street, but contended that Pitezel had committed suicide. The medical evidence negatived such a theory. The position of the body, its condition when discovered, were entirely inconsistent with self-destruction, and the absence of irritation in the stomach showed that the chloroform found there must have been poured into it after death. In all probability, Holmes had chloroformed Pitezel when he was drunk or asleep. He had taken the chloroform to Callowhill Street as a proposed ingredient in a solution for cleaning clothes, which he and Pitezel were to patent. It was no doubt with the help of the same drug that he had done to death the little children, and failing the nitro-glycerine, with that drug he had intended to put Mrs. Pitezel and her two remaining children out of the way at the house in Burlington; for after his trial there was found there, hidden away in the cellar, a bottle containing eight or ten ounces of chloroform.
Though assisted by counsel, Holmes took an active part in his defence. He betrayed no feeling at the sight of Mrs. Pitezel, the greater part of whose family he had destroyed, but the appearance of his third wife as a witness he made an opportunity for "letting loose the fount of emotion," taking care to inform his counsel beforehand that he intended to perform this touching feat. He was convicted and sentenced to death on November 2.
Previous to the trial of Holmes the police had made an exhaustive investigation of the mysterious building in Chicago known as "Holmes' Castle." The result was sufficiently sinister. In the stove in the cellar charred human bones were found, and in the middle of the room stood a large dissecting table stained with blood. On digging up the cellar floor some human ribs, sections of vertebrae and teeth were discovered buried in quicklime, and in other parts of the "castle" the police found more charred bones, some metal buttons, a trunk, and a piece of a watch chain.
The trunk and piece of watch chain were identified as having belonged to Miss Minnie Williams.
Inquiry showed that Miss Williams had entered Holmes' employment as a typist in 1893, and had lived with him at the castle. In the latter part of the year she had invited her sister, Nannie, to be present at her wedding with Holmes. Nannie had come to Chicago for that purpose, and since then the two sisters had never been seen alive. In February in the following year Pitezel, under the name of Lyman, had deposited at Fort Worth, Texas, a deed according to which a man named Bond had transferred to him property in that city which had belonged to Miss Williams, and shortly after, Holmes, under the name of Pratt, joined him at Fort Worth, whereupon the two commenced building on Miss Williams' land.