Relatives, friends -- even strangers -- left flowers, stuffed animals and candles on the Butler porch in Kansas City, Kansas.
Pamela had been abducted from outside her home Tuesday. Her body was found 25 miles away Friday afternoon, near a church in Grain Valley, Missouri.
An autopsy was performed Friday night, but U.S. Attorney Stephen Hill says the cause of death will not be released because the investigation continues.
Meanwhile, Keith B. Nelson, the 24-year-old suspect, faces a federal kidnapping complaint. Additional charges are possible. But prosecutor Hill says he wants to talk with all sides first.
He adds that the offenses in Pamela's death could justify a charge carrying the death penalty.
Nelson could be released from Kentucky University Hospital Saturday. He had surgery following knee and ankle injuries. He was captured Thursday, ending a two-day manhunt.
An FBI affidavit quotes a co-worker as saying that Nelson told him two weeks ago that he "would like to kidnap a girl to rape, torture, electrocute, kill and bury."
Pamela was skating about 5:45 p.m. Tuesday in her Kansas City, Kan., neighborhood, when her 11-year-old sister, Penny, said she saw a man get out of a white pickup, grab Pamela around the waist and throw her into the cab.