THE niece of Renfrewshire serial killer Peter Tobin has been jailed for an abusive campaign she waged on Facebook.

Jade Jackson, of Paisley, had been caged last year for threatening to slash a 12-year-old girl during a five-month campaign of abuse.

And, on Monday, she was locked up again for another lengthy campaign of online hatred.

She inundated five people with menacing messages and threats of violence over a six-month period.

Jackson, 22, was due to go on trial over two charges at Paisley Sheriff Court but defence solicitor James Arrol, a partner in law firm The Robert Kerr Partnership, struck a deal with prosecutors which saw her plead guilty to one charge in exchange for the other being dropped.

Jackson, of Espedair Street, admitted breaking the Communications Act 2003 by sending “electronic communications” to Owen McManus, Kerry-Ann White, Megan White, Tyler Bowie and Jaymee-Leigh McAliece which were “of an indecent, obscene or menacing character.”

The charge she admitted stated she sent a number of “abusive messages” to them, from an unspecified address in Paisley, via Facebook Messenger, between June 19 and November 3 last year.

Sheriff Tom McCartney caged her for 160 days for the offence.

Last year, Jackson - whose late dad was Tobin’s brother - was jailed for threatening to slash a schoolkid.

Paisley Sheriff Court heard she sent her young victim a chilling image of her holding a knife to her face via social messaging app Snapchat during a hate-filled campaign.

Jackson used a Facebook profile in the fake name of Jade Brown to terrorise the schoolgirl after accusing her of speaking to her boyfriend.

Between July and November 2015, she hounded the youngster, who can’t be named for legal reasons, sending her threatening messages on a daily basis.

In one horrifying communication, she said it would be “cool” when the youngster “had blood pouring from her.”

The youngster tried to bring the threats to an end by claiming her dad was a police officer but callous Jackson replied: “What’s he gonnae do? He will get smashed tae.”

Jackson was originally spared jail and was placed on a Community Payback Order (CPO) as a punishment for the campaign of abuse.

As part of the CPO, she was banned from using websites and apps for two years and told she would be supervised by social workers for three years.

But she never bothered to turn up for her supervision appointments.

She was caged for eight months in November last year for the CPO breach.

Tobin was jailed for the 2006 murder of student Angelika Kluk, 23, after her body was found hidden in the Glasgow church where the rapist was a handyman.

Police then found the remains of schoolgirl Vicky Hamilton, 15, and Dinah McNicol, 18, at his former homes.