And Brandon wasn’t acting maliciously. Instead, he was complying with everything I asked of him, to the point that he was living out of a hotel despite having the legal right to reside with me here, in a house he apparently co-owned. If it were all some elaborate lie, then what was he gaining from it?
I don't know what "in" does in the sentence "in a house he apparently co-owned"
I think if I remove "in", the sentence is also correct.
Am I right? or it can't be deleted, because there is a function of "in" I don't know.
EDIT: the source is here