As the last of the four victims in a suburban Kansas City slaying case was laid to rest Tuesday, police continued to investigate the killings that community members are calling the work of a "monster."

No arrests have been made in the slayings in the suburb of Raytown, and it's unclear whether investigators are any closer to charging someone.

The service for Andre Jones Sr., 33, was held Tuesday inside a packed Kansas City funeral home. Some mourners wore T-shirts emblazoned with "Help Us Catch a Monster!" that included photos of the victims: Jones; his 21-year-old girlfriend, Precious Triplett; and Triplett's nephews, 10-year-old Amir Clemons and 7-year-old Gerard Clemons. A funeral for Triplett and the boys was held Monday.

"An animal did what's taken place here," community activist Alvin Brooks told mourners at Tuesday's service, adding there's no acceptable explanation for the killings.

The four victims were found dead March 16 in a Raytown apartment. Triplett's 18-month-old son was there, too, but was not harmed.

Amir and Gerard were on spring break from school and had gone to the apartment the night before to stay with their aunt. The boys' father found the bodies when he went to the apartment after not hearing from them.

Investigators have declined to say how the four victims were killed. But Raytown police Capt. Ted Bowman has said detectives who saw the scene described the killings as "nothing short of vicious."

Some neighbors have said they thought they heard gunshots, but investigators have not said whether the victims were shot.

Police have not released any new information so far this week and did not return phone calls to The Associated Press for comment Tuesday.