What are the requisites that the prosecution must prove in a murder charge?

For the charge of murder to prosper, the prosecution must prove the following: (1) the offender killed the victim, and (2) the killing was done through treachery, or by any of the five other qualifying circumstances, duly alleged in the Information.  (People v. Gabrino,G.R. No. 189981, 9 March 2011, 645 SCRA 187.)