Pennsylvania cops illegally collected Luigi Mangione’s DNA when they gave him food and a soda at a police station the day of his arrest, the accused UnitedHealthcare CEO killer’s lawyers claim in court papers.

Mangione’s lawyers claim he was illegally arrested at McDonald’s in Altoona, Pa. on Dec. 9 since cops lacked probable cause during the encounter and allegedly failed to read him his rights and inform him he was a suspect for at least 20 minutes when he was swarmed by over ten officers.

Since the arrest was illegal to begin with, any further statements and evidence the cops collected that day, including his DNA taken from the items he ate and drank from at the police station were also illegal, Mangione’s lawyers claimed in court papers from last week.

“While illegally seized, arrested, and detained, [Mangione] was provided food and soda while at the Altoona Police Department Station,” his lawyers said in the filing. “The purposes for the same, was to obtain DNA from [Mangione] for further investigative purposes.”

Cops were only able to track Mangione to the fast food joint because of an anonymous 911 call, and they didn’t have any “independent corroborating evidence that [Mangione] was in fact the suspect sought in New York” during the arrest, the filing alleges.

Officers had no probable cause or grounds for the arrest “other than a hunch and/or unparticularized suspicion,” the court documents argue.

In addition to the DNA evidence, Mangione’s lawyers also want to keep out evidence taken from his backpack, including a ghost gun, a silencer, a loaded Glock magazine and multiple fake IDs.

Mangione’s lawyers are trying to keep all the evidence from that arrest out of trial and are even trying to get the charges in the Pennsylvania case dismissed on the same grounds.

Mangione is accused of executing healthcare honcho Brian Thompson outside of a Manhattan hotel on Dec. 4 and then going on the lam for five days until authorities tracked him down to the Keystone state.

He faces weapons possession charges and forgery and false identification crimes in Altoona.

He also faces more serious state and federal charges in New York for Thompson’s murder.

He’s pleaded not guilty in all the cases.

Mangione, 26 — who graduated from the elite University of Pennsylvania — has garnered a cult-like following from people disenchanted with the American healthcare system and corporate greed. 

A campaign that proclaims him innocent has collected nearly $740,000 for his legal defense fund to date.

The Blair County District Attorney’s Office — which is prosecuting the Pennsylvania case — didn’t immediately return a request for comment Monday.