SEATTLE (AP) — Authorities have identified an 18-year-old Seattle man and three juveniles as suspects in the stabbing death of a 15-year-old boy who police say was lured to a West Seattle park so he could be robbed of marijuana he allegedly had.

The Seattle Times reports the 18-year-old was arrested Tuesday afternoon at his house less than a mile from Westcrest Park, where, jail and court records say, Derek "Peachy" Juarez-Lopez was jumped, stabbed and robbed on Sept. 5.

Juarez-Lopez died hours later at Harborview Medical Center.

A spokesman for Prosecutor Dan Satterberg, Dan Donohoe, a King County judge Wednesday found probable cause to hold the 18-year-old on investigation of homicide and set his bail at $750,000.

The suspect is expected to be formally charged Friday.

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Information from: The Seattle Times, http://www.seattletimes.com