His body was found in the basement of a home next to his apartment, at 173 E. McMillan St. in Mount Auburn, which is currently being rehabilitated.
"We certainly have searched the exterior of this building extensively," Cincinnati Police Chief Jeffrey Blackwell. "That needs to be duly noted. We have walked around the perimeter of this facility. We (did not see) any sight of him."
On Tuesday, police and workers outside of the property told our news partners at WCPO they believe Dulle entered through a second-story fire escape on the back of the house. Assistant Police Chief Dave Bailey said investigators believe Dulle used his crowbar to enter through the window.
"I think it would have been a difficult place for people to discover him without actually being inside the building," Sammarco said. "Perimeter-wise, I don't think you would have seen any indication that someone was in there."
Bailey said authorities wanted to check inside the property during search efforts, but weren't able to and didn't think the building had been broken into.
"We made many, many attempts to try to contact someone inside the building," Bailey said. "We're always looking for areas where someone could have gotten into, a place that's been breached... This building appeared to have people in it. There was no obvious breach."
The body was spotted Monday night by a landlord who was there to inspect the property. When she called 911, she thought there was an intruder in the basement, according to Bailey. "She wasn't quite sure what she was seeing," he said.
Authorities said they believe Dulle was alone when he died, and they are still investigating where he obtained the cord used to hang himself.
Dulle's parents were officially notified late Monday evening of their son's death, a family spokesperson said.
"Brogan's family is heartbroken by the loss of their beloved son and brother," the spokesperson said. "The family is overwhelmingly grateful for the love, prayers, support and time given by the Cincinnati community."
Police theorize that Dulle may have planned to end his life in advance, "but we just don't know that," Bailey said at a news conference Tuesday. "It's been an investigation that's raised more questions than answers -- and there are probably questions we'll never have answers to."
Chief Blackwell said no foul play is suspected, and Dulle had a crowbar in his possession when he entered the building.
Dulle had been missing since leaving his apartment on May 18. The biggest lead police had was surveillance video released last Thursday. The footage showed Brogan walking along the 100 block of East McMillan Street and using a flashlight around 3 a.m. Sunday, not far from his apartment.
The last visible video captured Brogan returning to the vicinity of his apartment at 3:10 a.m., still using his flashlight. The video eventually loses sight of him when he steps out of camera range.
Authorities said Tuesday they have a theory Dulle was able to return to his apartment to retrieve the wine and crowbar used in his apparent suicide.
Police said they had no idea where Brogan's phone was during their search, and it stopped sending out pings, or signals, around 5 a.m. Sunday.
Authorities said that indicated the phone was either shut off or out of battery. Police have still not located his phone.
We will continue to update this story with our partners at WCPO Cincinnati.
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