TIMELINE: How Waltham Triple Murder Unfolded

Three weeks have passed since three people were killed on Harding Avenue, and Patch is taking a look back about how developments unfolded. Note: Times are approximate.

Monday, Sept. 12, 5 p.m.: Patch got word of police responding to a crime scene at 12 Harding Ave. Patch editor Ryan Grannan-Doll headed to the scene.

5:44 p.m.: Patch of three people in the Harding Avenue home.

6:47 p.m.: Middlesex County District Attorney Gerry Leone arrives at the scene where he is briefed by investigators.

10:11 p.m.: Leone briefed the gaggle of reporters saying three people had been found dead in a “very graphic” scene and that two people had been in the apartment prior to the murders.

Tuesday, Sept. 13

5:45 a.m.: Geoffrey Langton, a neighbor to the scene of the murder, tells reporters

Wednesday, Sept. 14

2:38 p.m.: The DA’s office identifies the

Thursday, Sept. 15

4:29 p.m.:

Friday, Sept. 16

Waltham officials spoke out about how the Harding Avenue neighborhood was coping with the tragedy.

Friday, Sept. 23

Patch reports that Geoffrey Langton was arrested for trying to steal pot from several people before threatening

Monday, Sept. 26

A look back at recent Waltham murders