the "DREAM ON" mission

[Cracked Skull 2.0]

how do i get past this mission there are three things i have found. the gun and the take out food drinks on the table and pizza on the other table there are three of these yellow icons on them but i can't seem to do anything with them and these i'm gessing the last three things i need to finish this mission

[Porkhammer]

Look for bloodstains and caulked up bulletholes in the hallway outside their bedroom.

[Cracked Skull 2.0]

thanks i'll try that