Charges could be coming in the case related to the deaths of three Kansas City Chiefs fans found in their friend’s backyard in January, though likely not against the homeowner, according to the homeowner’s lawyer.

David Harrington, 37, Clayton McGeeney, 36, and Ricky Johnson, 38, were visiting their friend Jordan Willis’ home in Kansas City to watch the Chiefs play the Los Angeles Chargers on Jan. 7. Two days later, the trio was found dead in Willis’ backyard.

Willis’ attorney, John Picerno, tells PEOPLE that after speaking with prosecutors involved with the case, he believes charges will be filed in the coming weeks — but not against his client.

“I do not anticipate that he’s going to be charged with any kind of a homicide in any way or involvement in that,” Picerno says. “And so obviously, we’re very pleased with that.”

Picerno previously said Willis was “unaware of how his friends died.”

Harrington’s father, Jon, previously told PEOPLE Kansas City police had read him a toxicology report indicating that cocaine and fentanyl were found in his son’s body, though the report has not been made public. Authorities have not disclosed causes of death for the victims.

Picerno says he believes the person who supplied the drugs to the men could potentially face charges.

Kansas City police have previously told PEOPLE the investigation is not a homicide investigation. In a statement to PEOPLE regarding Picerno’s comments, a police spokesperson says, “[Investigators] did advise they are continuing to work with the Platte County Prosecutor’s Office and could have some updates in the coming weeks.”

Prosecutors did not return PEOPLE’s request for comment on Picerno’s remarks.

In March, two months after his son died, Harrington said the results of the investigation wouldn’t change anything for him.

“I don’t really care what they find out now, It doesn’t matter to me,” Jon said. “I’ve already said my goodbyes to David and it’s not going to change anything.”

Jon said an “awful lot” of people showed up to David’s memorial on Jan. 21, which he said told him “how much they were missing him.”