Before Harold Smith murdered top Hollywood publicist Ronni Chasen, the ex-con forced a woman to lie down on a street before violently stomping on her head and breaking her jaw, RadarOnline.com has exclusively learned.

EXCLUSIVE DOCUMENTS: Read The Complaint Against Harold Smith

The horrific attack took place on January 20, 1998, according to the family of Farah Tehrani, another of Smith's victims, who spoke out in the wake of Chasen's brutal slaying.

The Beverly Hills Police Department revealed that the weapon Harold Martin Smith used to take his own life is a preliminary ballistic match to the weapon used to murder Ronni Chasen, a discovery that would not have been possible without an America’s Most Wanted tipster pointing them in the right direction.

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“I did this for one reason and one reason only,” the anonymous tipster wrote in an email to AMW and discovered by RadarOnline.com.

“And that was to get justice for Ronni Chasen, who could never get it for herself.”

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Before his suicide, Harold Smith was a "person of interest" in the murder of Hollywood publicist Ronni Chasen but a well-placed source tells RadarOnline.com that cops are now "99 percent certain he was not connected with her death.

PHOTOS:  Ronni Chasen Crime Scene Photos

"He was something of a nut," the source tells us exclusively.  "He was from New York and was involved in a number of purse snatchings after arriving in Los Angeles."

He was also arrested and spent 30 days in jail last year in nearby Manhattan Beach after he broke into a house and was found to be in possession of marijuana.

The relatively small-time nature of his past crimes plus the facts that Smith didn't own a car, and was openly bragging that he'd killed Chasen and was awaiting his $10,000 payment, are just some of reasons why cops don't believe he was the hit man.

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"At this time it is unknown if this individual [Smith] was involved in the Chasen homicide," the Beverly Hills PD admitted in a statement Friday night.

And on Saturday morning, RadarOnline.com learned that ballistic tests done on the gun Smith used to kill himself indicate it was not the same weapon used to murder Chasen.

As RadarOnline.com has reported, the BHPD now has video of Chasen's car as it hit a light post seconds after she was shot to death on a quiet residential street.  The tape came from a homeowner's security camera.

Chasen was a well-liked and highly-respected in her business.  She was on her way home from the Burlesque premiere when she was shot through the window of her luxury auto.

PHOTO:  Last Picture Of Ronni Chasen, At Burlesque Premiere

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Michael Brea was arraigned on charges of second degree murder Friday, in the shocking slaughter of his mother Yannick.

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The actor who appeared in several episodes of Ugly Betty and the movie Stand-Up 3D did not enter a plea during his arraignment in the hospital prison ward where he's being held, RadarOnline.com has learned.

Brea was also charged with criminal possession of a weapon.

On November 23, Brea's mother, Yannick was found hacked to death -- and reportedly decapitated -- in her bathroom. Cops found the actor hiding in his bedroom with a three-foot sword.  The two shared an apartment in Brooklyn.

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Brea's relatives are standing by him despite the gruesome nature of the crime.  In a statement, the family called him "a compassionate, gentle, intelligent, spiritual and loving man" who they say is in need of help.

"His family and friends know, without question, that Michael was not well in the moments leading to" Yanick's murder, the statement says.

In an interview with the New York Daily News, Brea claimed he was hearing voices prior to the attack.

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Brea is undergoing a psychiatric evaluations and is being held without bail pending his December 18 court appearance.

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VIDEO:  Person Of Interest In Ronni Chasen Murder Kills Himself

Hollywood's elite came out in Hollywood on Sunday, for an emotional farewell to one of their own, veteran publicist Ronni Chasen, RadarOnline.com can report.

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Many of the town's most powerful studio heads and producers were there. So were several of her prominent movie music clients, including the great composer Hans Zimmer. The biggest names in publicity also attended, several of whom spoke at the ceremony.

On the acting side, Peter Fonda, Frances Fisher and Elliott Gould were spotted in the crowd of over 600.

As RadarOnline.com was the first to report, Chasen was gunned down execution-style at 1:30 am Tuesday as she drove home from the Burlesque premiere and after-party.  As she traveled through Beverly Hills on the way to her West Los Angeles high rise condo, she was gunned down.

PHOTO: Last Picture Of Slain Ronni Chasen

Chasen, a highly respected movie publicist, specialized in representing movie music, and the composers and producers who made the magic happen.

Among her final projects was the upcoming Oscar campaign for Alice In Wonderland, produced by her close friends Lili Fini Zanuck and her husband Richard Zanuck, who was a pallbearer at today's burial.

Police have ruled Chasen's death a homicide.

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