We are mandated as an appellate court to sift the records and search for every error, though unassigned in the appeal, ...

In this jurisdiction, we convict the accused only when his guilt is established beyond reasonable doubt. Conformably with this standard, we are mandated as an appellate court to sift the records and search for every error, though unassigned in the appeal, in order to ensure that the conviction is warranted, and to correct every error that the lower court has committed in finding guilt against the accused.[13] 

Precedents/Link/Source: 
[13] Reyes v. Court of Appeals, G.R. No. 180177, April 18, 2012, 670 SCRA 148, 157; People v. Feliciano, G.R. Nos. 127759-60, September 24, 2001, 365 SCRA 613, 629; People v. Quimzon, G.R. No. 133541, April 14, 2004, 427 SCRA 261, 281; People v. Cula, G.R. No. 133146, March 28, 2000, 329 SCRA 101, 116.

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[2017V205] PP vs Barte