Police said a Pomona man who was charged with murder on Tuesday, Feb. 19, in the Inglewood cold case kidnapping and killing of an 11-year-old boy almost 29 years ago did not act alone.

Inglewood Mayor James Butts, left, and Ruth Tillett, mother of William Tillett, leave the podium after a news conference Wednesday, Feb. 20, 2019, in Inglewood, Calif. Authorities say a 50-year-old man is in custody in connection with the kidnapping and killing of then 11-year-old William Tillett in Southern California nearly three decades ago. (AP Photo/Jae C. Hong)

Hubert Tillett, right, brother of William Tillett, stands behind a display showing his brother, bottom left, during a news conference Wednesday, Feb. 20, 2019, in Inglewood, Calif. Authorities say a 50-year-old man is in custody in connection with the kidnapping and killing of then 11-year-old William Tillett in Southern California nearly three decades ago. (AP Photo/Jae C. Hong)

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Inglewood Mayor James Butts stands in front of a photo of William Tillett during a news conference Wednesday, Feb. 20, 2019, in Inglewood, Calif. Authorities say a 50-year-old man is in custody in connection with the kidnapping and killing of then 11-year-old Tillett in Southern California nearly three decades ago. (AP Photo/Jae C. Hong)

Flanked by Inglewood Mayor James Butts, right, and Police Chief Mark Fronterotta, left, Ruth Tillett, mother of William Tillett, breaks down during a news conference Wednesday, Feb. 20, 2019, in Inglewood, Calif. Authorities say a 50-year-old man is in custody in connection with the kidnapping and killing of then 11-year-old William Tillett in Southern California nearly three decades ago. (AP Photo/Jae C. Hong)

Edward Donell Thomas, 50, of Pomona, was arrested by Inglewood Police detectives Thursday, Feb. 14, on suspicion of the 1990 kidnapping and killing of William Tillett. The victim was 11 when he was found dead in Hawthorne almost 29 years ago on May 24. (Photo courtesy of the Inglewood Police Department)



William Tillett was abducted while walking home from school near the intersection of Imperial Highway and Crenshaw Boulevard at about 3 p.m. on May 24, 1990, according to a news release from the Inglewood Police Department. He was found suffocated to death at a parking structure in a residential Hawthorne neighborhood later that day.

Detectives took Edward Donell Thomas, 50, of Pomona, into custody on Thursday as a suspect in the decades-old case, according to inmate records.

Thomas was booked into the Inglewood City Jail following his arrest and later held without bail. Prosecutors filed charges including murder against Thomas on Tuesday.

Inglewood Police Capt. Mark Fried told reporters Wednesday that investigators had “significant and compelling physical evidence which implicates Edward Thomas in the murder of William Tillett.”

Chief Mark Fronterotta did not discuss details of how Thomas was linked to the slaying but said it involved old evidence and “advanced technology.”

Investigators said they believe Thomas was likely aided by an accomplice, but did not mention if they had identified other possible suspects.

Police asked anyone with information that might be relevant to the case to call Inglewood Homicide Detectives at 310-412-5246. Anonymous tips can also be left at 888-41-CRIME (27463).