TMZ Composite

J Prince Man Who Allegedly Executed Ex's Daughter Is 'Clown' ... We Must Stand Up To Him

Hip hop mogul J Prince is sounding the alarm on an alleged Houston gang member who cops say executed his ex's daughter as revenge for a breakup ... Prince says the guy needs to be held accountable

Prince -- the Rap-A-Lot Records honcho who has a reputation for getting things done in Houston -- put the alleged killer on blast Wednesday, telling his 756k Instagram followers ... "We can't have clowns like this running around purposely killing our babies and be ok with it."

Houston police say 22-year-old Jeremiah Jones is the triggerman in a child's fatal shooting, and he's been arrested following a manhunt and booked on counts of capital murder and aggravated assault with a deadly weapon.

Cops say Jones "executed" 9-year-old Khylie Sorrells as possible "revenge" over the girl's mother breaking up with him several months ago and allegedly seeing other men.

Police say Jones went to his ex-girlfriend's home Monday night and got into an argument with her before shooting the woman's child in the head.

J Prince appears to be making a call to action, saying ... "Stand with me on preventing this sick individual from harming another baby. I'm not advocating violence, but we have to protect our kids."

Prince also has this to say about Jones ... "I don't care what gang he's with they are no match for us."

The guy is due in court, but it sounds like there won't be a warm welcome if he's ever released from custody.

Click here for info about our online advertising practices.