PORTLAND, Ore. -- The grand jury in the Kyron Horman case met Thursday. The proceedings are secret but sources tell KGW that Thursday s grand jury proceeding focused on nailing down the exact actions of Kyron s step-mom Terri Moulton-Horman on the day the boy disappeared.

A friend of Terri Horman s, Chelsea Aleshire, was seen leaving the courthouse Thursday. She said she talked with Terri on the day the boy went missing---but refused to comment on what if anything she told the grand jury.

Sources, including one who has spoken with investigators, also told KGW that at least two friends of Terri's purchased cell phones for her in the days after Kyron s disappearance.

Investigators were calling those friends and others in front of the grand jury for sworn statements on what they did and why they did it.

Investigators were also still working to pin down the exact movements of Terri Horman on the day her stepson disappeared, as well as on the exact movements of her friend, DeDe Spicer.

Some of the testimony was expected to focus on people who saw and dealt with the women on the day Kyron vanished.

Legal experts told KGW that prosecutors sometimes use the jury as an investigative tool because its subpoena power forces people to testify. It wasn t known how long the grand jury will meet.

Complete Coverage: Search for Kyron Horman

KGW's Colin Miner contributed to this report

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