A group of good Samaritans helped nab the 25-year-old Ecuadorean migrant wanted for the brutal sexual assault of a 13-year-old girl at a Queens park — smacking him around and tying him up with a belt. Dramatic video and photos obtained by The Post shows the shirtless creep – later identified by police as Christian Geovanny Inga-Landi – cowering on the sidewalk early Tuesday as the angry mob pounds him and calls him out as “a rapist.”