MINNEAPOLIS (WCCO) – Police in Minneapolis are looking for the public’s help in solving a 20-month-old homicide.

Lois Swenson, 76, was found dead inside her north Minneapolis home in June of 2012. Investigators think they know who is involved; they just need more information from the public to make an arrest.

READ MORE: Minnesota Weather: Perfect Snow Melt Will Minimize Flooding

“It’s been a hard wait, it’s been a hard wait,” said Sonya Forseth.

Whenever Forseth thinks about her friend, she fights back tears. Swenson was a popular peace, justice and environmental activist.

“It just seems that someone who fought for justice, like she did, she should receive justice,” Forseth said.

Friends say Swenson had a big heart, and would often open her home to those who had no place to go.

Investigators say they are close to charging the person responsible, they need the public’s help to bring him to justice.

“You know, in my 19 years now in homicide, I have never had a case that this close to being charged, yet we can’t charge it without a little bit more,” said Lt. Richard Zimmerman.

READ MORE: Downtown Minneapolis Businesses Hope Chauvin Trial Brings Much-Needed Boost

He believes the person responsible for Swenson’s murder was someone she was helping.

“[She] let him live in her house, would give him money, but had cut off all the money, and had told him to move out and he became angry,” Zimmerman said.

Swenson was found dead in her home after friends got worried when they hadn’t heard from her in several days.

Zimmerman believes at least one person has the information he needs.

“We know there is one person that is close to this guy, and we need that person to come forward,” Zimmerman said.

Crime Stoppers is partnering with Minneapolis police to offer up to $1,000 reward for information leading to an arrest.

MORE NEWS: BCA Identifies Brothers Who Died In Wadena County Shootout

If you know anything, call 1-800-222-8477.

Reg Chapman