Authentication committee rejected 13 works owned by gallery clients, effectively rendering them “worthless”, according to court papers

This is the eighth of ten legal cases brought by collectors who bought forged paintings through the now defunct gallery

Collectors still in the dark even when experts have doubts as reports rarely published

The artist is accused of using a London photographer’s image of the Sex Pistol’s bassist in an Instagram work

Settlement collapses as discussions between Joseph Tierney, Moschino and creative director Jeremy Scott break down

Nearly four years after New York was left half-submerged in water, legal rows over who should pay for damage to works of art rumble on

In an exclusive interview, Ann Freedman explains her version of events in the ongoing forgery case that engulfed the gallery

Testimonies reveal how much the New York gallery depended on sales, and huge mark-ups, of works from Glafira Rosales

Citing an earlier case they won, the artist and his dealer argue Rastafarian Instagram screenprints are transformative

Although the evidence seemed largely in their favour, fraud cases are notoriously risky to prove

Agreement came before owner and former director could testify, but the trial gripped the New York art world

Mid-trial deal comes just a day before the former gallery director was scheduled to take the stand

James Martin of Orion Analytical says the gallery asked him to remove key findings, like a pigment that was not in use at the time of painting

Seven of 11 specialists named by the gallery say they never authenticated work that turned out to be a forgery

David Anfam and Christopher Rothko were among 11 experts the gallery listed as having viewed the painting

Eleanore De Sole said she went into a “shaking frenzy” when she read that another work sold by Knoedler was suspected to be fake

The ruling covers two lawsuits brought by insurance companies looking to recoup costs paid or owed to their clients

Domenico De Sole bought a fake Rothko from the gallery in 2004

Lawyers for the collectors and the gallery go head-to-head as one of New York’s biggest art world scandals goes to trial

It should provide guidance on who is responsible when forgeries are sold

Donald Graham might have a stronger case than previous attempts against the appropriation artist

Both sides seek to exclude key witnesses and evidence from the forgery case which is set to begin on 25 January

Collector John Howard bought the forgery from now defunct gallery for $4m

Judge dismisses attempts to throw out lawsuits and orders trial over fake Abstract Expressionists

The gallery’s former director Ann Freedman will “tell her story”, her lawyer says

Six cases remain open in Abstract Expressionist fakes scandal that has entangled many in the art industry

Joseph Tierney says the Italian designer Moschino has used his work without permission in a line of clothing famously worn by the pop singer

An Ohio collector says the artist did, after he purchased her restored Log Cabin from a gallery for $1.4m, but a representative for the dealer says she just wanted the work to be revalued

Neue Galerie exhibition features loans from private collectors