Dallas Gunman's Parents Tearfully Break Their Silence: 'I Love my Son... I Hate What He Did'

The Dallas gunman left behind a cryptic message behind before his standoff with cops.

The parents of Dallas gunman Micah Xavier Johnson have spoken out for the first time since their son’s attack on police Thursday night.

Speaking to The Blaze, Johnson’s father, James Johnson, 55, and his ex-wife, Delphine, 49, broke down in tears as they discussed their veteran son’s devastating actions during a protest march.

“I love my son with all my heart. I hate what he did,” James said.

The astonished father added: “I don’t know what to say to anybody to make anything better. I didn’t see it coming.”

The parents spoke inside Delphine’s Mesquite, Texas, home where Micah, 25, had lived with his mother.

She said her son lived like a “hermit” following his return from the Army.

“The military was not what Micah thought it would be,” she said. “He was very disappointed, very disappointed. But it may be that the ideal that he thought of our government, of what he thought the military represented, it just didn’t live up to his expectations.”

In 2014, Micah was discharged from the Army amid allegations of sexual harassment.

Officials have confirmed the Dallas gunman wrote the letters “RB” in blood before he was killed Thursday in a standoff that followed the slaughter.

Read: Dallas Sniper Was Shipped Home From Afghanistan After a Female Soldier Accused Him of Sexual Harassment

Johnson scrawled the messages with his own blood after he was apparently wounded during the siege in the city.

Dallas Police Chief David Brown told CNN Sunday: “At the scene where he was killed, he wrote some lettering in blood on the walls, which leads us to believe he was wounded on the way up the stairwell, on the second floor of the El Centro building and where we detonated the device to end the standoff there was more lettering written in his own blood.”

Brown added that police are “trying to figure out what those initials mean, but we haven't determined that yet.”

Johnson, an Army vet, was believed to plotting other attacks, according to Brown.

Investigators have seized Johnson’s laptop, phone and personal journals in an effort to decipher what “RB” means.

Authorities went to the gunman’s home and discovered bomb-making supplies.

Brown said: We're convinced that this suspect had other plans and thought that what he was doing was righteous and believed that he was going to target law enforcement — make us pay for what he sees as law enforcement's efforts to punish people of color.”

Johnson was killed by police who used a bomb detonating robot following negotiations.

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The use of a robot bomb has come under fire but Brown has defended its use.

“We had negotiated with him for about two hours, and he just basically lied to us — playing games, laughing at us, singing, asking how many [police officers] did he get and that he wanted to kill some more and that there were bombs there," Brown said, "so there was no progress on the negotiation."

He added that he would approve of the device again “if presented with the same circumstances.”

Watch: Sister of Dallas Gunman: 'I Keep Saying It's Not True'