Which cranial nerve is involved in the clinical presentation shown below?

First picture is showing the neutral position of eye, when pt is looking straight. 2nd picture - pt is asked to look towards right side. Right Lateral rectus & left medial rectus is used and its normal. 3rd picture - pt is asked to look towards left side. Right medial rectus is used, but left eye remained in neutral position which is indicative of paralysis of lateral rectus of left eye supplied by 6thC.N - ABDUCENT NERVE . Threfore, Pt has squint.