18-year-old Alexis Valdez, who had been living with his aunt and her 41-year-old boyfriend Silvestre Diaz-Hernandez, would return home from making a run to a local convenient store with Silvestre on Christmas eve 2013. Upon returning from the quick trip, Valdez would let Silvestre enter their apartment first and then savagely attacked Silvestre from behind with a hammer and brutally killed him. Valdez would leave a Christmas present on his aunt’s bed one that she would never forget. Had something sinister been occurring in the apartment to make Valdez react in such a violent way or was this just a sinister mind at work.

References:
1.    Alexis Valdez, Chicago Teen, Allegedly Decapitated Man As A 'Present' For His Aunt [UPDATES] | HuffPost Chicago

2.    Alexis Valez, 18, charged with decapitating man in Chicago - CBS News

3.    Alexis Valdez, Chicago teen, charged with killing, decapitating aunt's boyfriend as "present" to aunt - CBS News

4.    Man Gets 33 Years In Prison For Decapitating Aunt's Boyfriend - CBS Chicago (cbsnews.com)

5.    Teen Kills Aunt's Boyfriend, Puts His Head in Bed as Present: Prosecutor - Hermosa - Chicago - DNAinfo

6.    Officials: Defendant offered dismemberment as a 'present' – Chicago Tribune