A late-night SWAT operation at a Buena Park business Wednesday led to the arrest of a man suspected of a deadly assault, authorities said.

Police arrested the 57-year-old man, who they say may have been living inside a psychic business on La Palma Avenue just a few feet away from where the deadly assault took place.

The business sits right across the street from Knott’s Berry Farm and near a parking lot where there’s a memorial for 29-year-old Elton Harrell. On Dec. 29, investigators say Harrell was assaulted and later died at the hospital from his injuries.

“He loved being here so much. This is always where we will come to see him now,” said Cindy Salazar, a friend of Harrell.

Friends and family told NBC4 that the 29-year-old called the parking lot home. Harrell’s mother, Barbara Campbell, says her son suffered from mental illness and was homeless.

“Everyone loved my son, he was a good guy,” said Campbell. “Never hurt anybody, never bothered anybody.”

Campbell says she still has the blankets and bags of clothes she would bring to him every day.

“Every day as long as he didn’t disappear,” said Campbell.

For a week and a half, the family searched for answers and so did Buena Park investigators, who say a search warrant led them right across the street from where Harrell was attacked.

On Wednesday, authorities say they detained a woman and arrested 57-year-old Barney Lee on suspicion of murder. The woman was later released.

“We’re unsure what the relation is to the business. We are unsure of the status of the business that’s still part of the ongoing investigation as to the relationship to the location,” said Buena Park Police Sgt. Martin Tomsick. “It did appear they may be living in the location we are unsure.”

Harrell’s loved ones say they still have a lot of unanswered questions, like why anyone would hurt him.

“We’re never going to be the same. I want to know why someone would take my son’s life like he was nothing. He was something and somebody, and we loved him. He was somebody to us,” said Campbell.

Police say they are still investigating whether Harrell knew the man they arrested. The motive for the assault is unclear.