As you're talking and arguing, Selprin sees over Jarval's shoulder another City Guard, this one likely a sergeant, with red stripes on his shoulder plates walks out the path to the front gate, says something briefly to the person at the door, who shrugs and shakes his head. The sergeant nods, salutes, (which is returned by the guard at the gate), and goes back inside the house. At the same time, Elias, you notice that just as that back corner of the yard, there is a small gap between the two apartment buildings which flank this building: you'd need to get over the 10-foot gate, but a person could definitely slip through the two buildings and into the back yard if they wanted.