Joe Jackson Gunning to Sue Over MJ's Death

Joe Jackson is trying to force UCLA to hand over all of their medical records on Michael Jackson -- because daddy is looking to sue whoever is responsible for killing his son ... according to documents obtained by TMZ.

TMZ has obtained documents that Joe filed Friday in L.A. County Superior Court -- in which he claims, "The UCLA records will permit [Joe] to determine with medical experts and then present to this court, how much support [Joe] needs to pay for the prosecution of his wrongful death action against those responsible for his son's death."

Michael was transported to UCLA on June 25, 2009 -- where he was pronounced dead on arrival.

Joe says in the documents that Michael was already dead when he arrived at UCLA so there is no physician-patient privilege for a dead man.

Joe Jackson filed the papers in the Michael Jackson estate case -- responding to the Estate's opposition to Joe's motion for Michael's medical records. Joe claims the estate has refused to file a wrongful death lawsuit on his behalf and it is costing him money.

According to his legal docs, Joe thinks the medical records will show what really happened to Michael, and that will help Joe determine how much he'd be able to collect from those responsible for Michael's death.

UPDATE: Howard Weitzman, lawyer for Michael Jackson's estate, tells TMZ, "The estate continues to believe Joe Jackson's claims are not well taken and he should not have access to Michael's medical records."