An Upper Darby man is facing charges after allegedly walking into a police station and lighting up a joint, then undressing, defecating on the floor, then smearing his waste on the walls.It was around 11:30 a.m. Sunday when police say 33-year-old Carlen Higgs walked into the Upper Darby police station talking gibberish.He then allegedly sat down in the station lobby and lit up a marijuana cigarette.Higgs was then arrested and placed in a holding cell.While in the cell, police say, he took off all of his clothes, defecated on the floor and then wiped his waste on the walls.Higgs was taken to a mental health facility where it was determined that he was high on drugs.He is now charged with possession of an illegal drug and disorderly conduct.