>> that guy that got down here, the crip, he knows he's a crip but he won't admit it. >> riverhead is operated by the sheriff's office and house a combined total of about 1,500 inmates. the majority are only charged with crimes but awaiting trial in the resolution of their cases but nearly all of them feel the impact of gangs. >> another day in paradise, i guess. >> got like four positive hits today john, one crip, latin king, two bloods. >> combatting activities is up to a team of investigators in the veil's gang unit headed by sergeant investigator lundquist. >> bloods are the biggest gang we have in this jail. almost every housing area in the jail has bloods in it. we have bloods within the workers, bloods on all the floors, bloods on all the pods. >> that could be changing. >> this has always been a blood jail for years. now we are getting a big influx of crips in lately. some of them are getting their numbers up, so they feel they have to take back what the bloods have many over the years.