As President Donald Trump heads today to both El Paso, Texas, and Dayton, Ohio, to console the two grieving communities in the wake of mass shootings this weekend, some new details have emerged about the background of the man who opened fire on innocent people in Dayton in the wee hours of Sunday morning. (Shown above is a scene from Dayton after the horror.)

The gunman was using an AR-15-style rifle, authorities said, when he began shooting in a popular nightlife district. He wound up killing nine people — including his own sister — and injuring 27 more before police, within just 30 seconds of the start of his rampage, took him out.

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Now, two former girlfriends of the killer — whom LifeZette will not name here — have spoken out about the man they spent time with in the recent past.

Caitlyn “Adelia” Johnson dated the killer from March to May of this year. On their first date, she said, he showed her video footage from the mass shooting at Pittsburgh’s Tree of Life Synagogue in October 2018.

He seemed to dwell on such horrific acts — so she recalled asking him, “Do you know tragedies from every city?”

The young man admitted he did, as The New York Post reported.

The woman also wrote in a chilling post on Medium, “That man who was so sweet to me and told me he loved me was a mass murderer … I kissed a mass murderer.”

Another woman, a high-school crush of the man’s, also told The Washington Post that he would “cry to me sometimes … how he’s afraid of himself and afraid he was going to hurt someone one day. It’s haunting now,” she added.

Related: Dayton Shooter Had ‘Extreme Left-Wing’ Beliefs, CNN Quietly Admits

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The White House was not releasing specifics of President Trump’s schedule on Wednesday, but the president indicated that while in Dayton, he’ll be meeting with members of law enforcement as well as victims.

See his tweet below from Tuesday:

In her post on Medium about the Dayton gunman, the former girlfriend wrote that she and the man “met in our social psychology class at Sinclair College. We bonded over the laughable conspiracy theories that our professor tried to preach as we walked to similar parking spots in the college parking garage.”

“We also were very open about our mental illnesses from the very beginning,” she wrote. “He told me that he had bipolar disorder and possibly OCD; that didn’t scare me, some of the sweetest people I know have those conditions. I told him that I have depression, generalized anxiety, and ADD.”

“I thought I had a decent judgment in character, but now I feel like my entire psyche needs to be scooped out and reevaluated under a microscope,” the former girlfriend wrote.

“We bonded over depression humor, something that only people who have been in the throes of it really ever understand and find humorous. Joking about personal mental illnesses is one of the biggest coping tools in the mental health toolbelt.”

Toward the end of the post, she wrote this, clearly still stunned about it all: “My ex-boyfriend was a mass murderer. My ex-boyfriend was a mass murderer. I still don’t know how to wrap my head around that. That man who was so sweet to me and told me he loved me was a mass murderer. I kissed a mass murderer. I thought I had a decent judgment in character, but now I feel like my entire psyche needs to be scooped out and reevaluated under a microscope. I am beyond thankful that I have such a wonderful therapist to help me through this.”

Meanwhile, Dayton Mayor Nan Whaley, a Democrat, insisted in advance of the president’s visit to her city that Trump’s past comments on various issues have been painful to many people there.

“I’m disappointed with his remarks,” Whaley said, as USA Today reported. “He mentioned gun issues one time. I think watching the president over the last few years on the issue of guns, I’m not sure he knows what he believes, frankly.”

She also tried to land an unfortunate low blow. “I’ve heard that he’s coming Wednesday, but I have not gotten a call,” she told reporters. “And, you know, he might be going to Toledo — I don’t know.”

The president — a human being like everyone else — had accidentally said “Toledo” instead of “Dayton” during his remarks on Monday about the two mass shootings in two American cities.

And see these tweets from the president: