Investigators for an Arizona sheriff’s volunteer posse have declared that President Barack Obama’s birth certificate is definitely fraudulent.

Members of Maricopa County Sheriff Joe Arpaio’s posse said in March that there was probable cause that Obama’s long-form birth certificate released by the White House in April 2011 was a computer-generated forgery.

Now, Arpaio says investigators are positive it’s fraudulent.

Mike Zullo, the posse’s chief investigator, said numeric codes on certain parts of the birth certificate indicate that those parts weren’t filled out, yet those sections asking for the race of Obama’s father and his field of work or study were completed.