Top Cop's Anguish: Dallas Police Chief's Own Son Was a Cop Killer Who Died in Shootout

The tragedy in Dallas has put Chief David Brown's personal turmoil back into the headlines.

Dallas Police Chief David Brown is winning praise across America for his leadership at a time of crisis, but his cool handling of the city's crisis masks a deep personal anguish.

Read: President Obama Tries to Ease Racial Tensions With Stirring Ode to Dallas Shooting Victims

Just seven weeks after Brown became chief in 2010, his son, David Jr. committed a heinous crime, killing a police officer, as well as another man.

David Brown, Jr. was high on PCP when he shot a total stranger dead, according to reports.

In a call to 911, a witness said: "Somebody got shot. This girl is screaming out here. She says somebody shot her boyfriend. He's got a rifle and he's moving real slow."

Read: First Black Miss Alabama Courts Outrage After Calling Dallas Shooter 'Martyr' in Viral Video

When a police officer responded to investigate the report, he was shot dead as well. Minutes later, more officer responded. The 27-year-old Brown was killed in a resulting shootout.

At the time, the police chief released a statement: "This hurts so deeply I cannot adequately express the sadness I feel in my heart."

On Tuesday, Chief Brown introduced President Obama at Tuesday’s memorial service for the five slain police officers who were shot and killed by a sniper last week during a Black Lives Matter protest.

Watch: Hero Mom Wounded While Shielding Her Sons From Gunfire During Dallas Sniper Attack