PORT-AU-PRINCE, Haiti — Members of a church in Haiti said on Saturday that an American missionary slain in his home last week was well liked and called on police to find his killer.

George Knoop, 77, was stabbed multiple times last Tuesday afternoon in the Delmas section of Haiti’s capital. The missionary from Chicago was alone at the time and apparently knew his assailant, according to friends and police.

Detectives have taken two statements, but no arrests have been made in the case and the motive for Knoop’s murder is still not known, said John Munsell, chairman of the board for the Quisqueya Chapel in Haiti where Knoop worked.

“We’re definitely wanting this person to be found and brought to justice,” said Munsell. The Quisqueya Chapel is a non-denominational and evangelical church.

After he was stabbed, Knoop called a security guard who worked at the church and cried for help. Munsell said Knoop may have called the guard because it was the first number he could reach in his cellphone.

Church members then went to Knoop’s home, a two-minute drive away, and he was found on the floor. Police later recovered the knife. A computer was apparently stolen during the attack but it does not appear robbery was the motive.

Knoop was taken to a hospital and pronounced dead at 5:09 p.m.

“In terms of us here at the chapel, we are not aware of any conflicts he had with people,” Munsell said. “He was well liked.”

Knoop also mentored young men and led Bible study groups. “He worked with guys, take them under his wing and follow up with them. ‘How’s it going?’ That kind of stuff,” Munsell said.

Knoop came to Haiti for the first time in 2010 in the aftermath of the earthquake. He became an elder with the Quisqueya Chapel and worked as a volunteer for U.S.-based Missionary Flights International.

He was divorced and didn’t have any children, Munsell said.

A memorial service was planned for Wednesday afternoon.