TMZ Live

Kris just called in to "TMZ Live" from Australia (where Kendall is alive and doing a photo shoot) ... and told us she's on a mission to hunt down and punish the person who LIED about her family to the L.A. County Dept. of Children and Family Services.

As we previously reported, officials visited Kris' Calabasas home last month after receiving multiple "tips" from an anonymous caller that the kids were in danger.

Kris says ... besides the LIE about Kendall, the caller had also told officials Kris had beaten Kylie with a belt on a specific date.

But investigators quickly realized it was all bogus ... because when they arrived to the home, Kendall was hangin' out at the house. Kris says Kylie wasn't even in the country on the day of the supposed belt attack.

Now, Kris says ... she's hired people to unmask the bogus tipster ... who she believes is a tabloid reporter.

Faizon Love says he feared for his life when Katt Williams pulled a gun on him this week, telling TMZ ... Katt's obsession with drugs and firearms could have cost him his life.

Love called into TMZ Live Friday to explain what went down Tuesday night -- when Katt pulled a gun on him at a parking lot outside Supperclub in Hollywood.

Love says ... when Katt pointed the weapon at him, he 100% feared getting shot, explaining ... "When someone pulls a gun and they on that narcotics ... you don't know what's gonna happen."

One of Love's homeboys managed to snatch the gun from Katt -- and discovered it was unloaded.

Katt was arrested that night for a possible gun violation, but was later released from custody -- and no charges have been filed.