>> tonight, the alleged fake teen doctor charged with practicing medicine without a license. a year after being caught on surveillance roaming a hospital acting like a doctor. how police say he tricked his patients and his family. our reporter goes one on one with the teenager. >> are you in big trouble? >> what prompted him to storm out of the interview. they call him the king of snapchat. dj ka lid is the hip-hop producer behind some of the decade's biggest anthems like "all i do is win." >> they don't want you to say no wrong -- >> rubs shoulders with kim kardashian and justin bieber. but it's his creative use of social media that has sent his fame through the roof. we're in miami along for a wild ride. and the donald versus the pope. the leader of the catholic church speaking out against christianity.

question a person's faith is disgraceful. >> is this finally the feud that damages trump's candidacy? or could it actually help him? but first the "nightline 5." >> the boldny saup rogue with intuitive all-wheel drive. because winter needs a hero. now get a $189 per month lease on the 2016 nissan rogue.

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alleged fraud of such audacity, such tenacity, it boggles the mind. it involves an 18-year-old baby-faced kid accused of mask raiding as a doctor. police say treating patients out of his own clipping. and wait until you see what happened when he went one on one with abc's matt gutman. >> reporter: he has a lab coat and stethoscope. but police say this baby-faced physician doesn't have an m.d. >> are you a fraud? because it seems like everything you're saying to me is evasive. >> i don't appreciate your tone. >> reporter: to understand why this guy is storming out of our interview, you have to go back about 24 hours. >> malachi, they say you've been practicing medicine without a license. >> reporter: malachi love johnson or dr. love as he refers to himself was marched out of his west palm beach clinic in handcuffs. >> how do you feel now, all the people that believed in you, that thought that you knew what you were talking about? >> reporter: one other thing,

>> i'm hurt because of the accusations and allegations. like i said, this is not the first time where i've been accused and i will pursue this. >> reporter: only last year malachi, then just 17 years old, was detained at this local hospital in west palm beach. the police report says he was walking around the halls in a doctor's coat. >> i believe it said department of anesthesiology on it. >> reporter: witnesses reporting he'd been roaming the hospital halls for a month. >> this story was broadcast everywhere. like i'm some insane maniac. >> reporter: last month you're affiliate wpb caught up with him. >> i didn't snatch up a baby, i didn't do any of that. >> reporter: police snapped this picture of the lab coat in his car. on one lapel, the title "anesthesiologist." on the other, his name. the hospital did not press charges, claiming in a statement the individual never had contact with any hospital patients and did not gain access to any patient care areas. none of that deterred love

just this past october, a second incident. the florida department of health issuing a cease and desist order claiming love robinson was leading the public to believe he was a licensed medical doctor while serving as a therapist in another florida rehab facility, but for love robinson, is the third time the charm? the 18-year-old indeed now facing serious accusations from police. seven of them. including grand theft and fraud for allegedly practicing medicine without a license. >> so are you a doctor of anything? anything at all? >> i do currently hold a ph.d.. in what i don't feel comfortable disclosing because that is not the issue here. the issue that i face now is accusations. >> reporter: after being released from jail on a $21,000 bail, malachi sat down with abc news. >> do you even have a high school diploma? >> yes, i do possess a high school diploma. >> reporter: the website for his

his beaming bio referring to him as dr. love and calling himself, well, a well-rounded professional. >> he's facing a number of serious felonies here with the possibility of up to five years in prison on each of them. >> reporter: it was in early january malachi held a grand opening for this medical clinic. that's when police decided to write in an undercover cop to the clinic posing as a patient. >> the undercover officer who was part of your arrest said that you treated her. and that's what's in the charge sheet. >> the undercover officer, when she came in, she merely had her weight taken, her blood pressure taken, and her loung are lungs listened to. other than that there was nothing out of the ordinary of something that your simple mother would do. >> reporter: police say it was when he started conducting her physical exam that they arrested him. in a press conference malachi claiming it was all a misunderstanding. >> i am deeply saedened and a little disrespected by some of

>> reporter: this isn't the first time a teenager has been busted for channeling his inner mcdreamy. matthew shied in orlando, florida. in 2011 the young man reporting for duty in an e.r. with a badge identifying him as a physician assistant, stethoscope in hand. like leonardo dicaprio in "catch me if you can," he ootszed confidence. >> do you know if they're hiring at the hospital? >> what do you want to do? >> i'm a doctor. >> reporter: unlike leonardo dicaprio's character, who got queasy in the emergency room, shied is drawn to the action. he was also charged for impersonating a police officer. shied was convicted on four felony charges, serving a year in jail, and was released in 2013. but when it comes to malachi love robinson, police are now questioning whether he too was attempting to pass as a medical doctor. this time in his very own

>> this is the new birthing life medical center -- >> reporter: last month he proudlyproud ly showed off his medical center to a local reporter. >> up on the wall so they are visible to the public -- >> reporter: that was after he removed his lab coat and stethoscope. the sign on the door has his name and those two crucial letters. "m.d." >> the sign on the door was due to be changed. >> have you had training? >> i have. i have shadowed many doctors. >> you're saying your training comprises shadowing other real doctors? >> your training comprises a lot of things. >> but you weren't in med school. >> so i am not portraying as an m.d. i've never said that i've gone to school to be an m.d. >> reporter: how does an 18-year-old with no real medical training or much formal schooling at all open a medical office? ask his business partner, percy wells. he claims to have invested

>> i feel like i shouldn't judge until i know. when the gavel hit and the jury decides that he was lying and the evidence mounts up to the fact that he is a liar, that's when i'm going to say to myself, yep. he's a liar. >> if you've got questions, a degree on the wall shouldn't be enough. you should go online, do your research, and make sure that the person is actually a registered physician. >> reporter: police allege he even treated the elderly. among them an 86-year-old woman. police say he treated her recently for severe stomach pain and charged her nearly $3,500. >> what services did you provide in exchange for that money? >> i can tell you this. accusations are merely accusations. and services you'd have to define that. whether she paid for me to just show up, that's up to her. >> you're not denying the fact that she paid you $3,500 or so?

>> no, i am denying that. >> are you a fraud? >> i don't appreciate your tone. i don't appreciate the way you're portraying this interview to actually be. >> reporter: then a moment we didn't expect. >> i don't know where you're receiving this information from but it is inaccurate. i'm sorry, i'm going to have to cut this interview short. >> reporter: but he has said this may not cut his medical career short. saying he hopes to open another clinic in the future that is, of course, once he's done dealing with his legal woes. for "nightline," i'm matt gutman in los angeles. next, the hip-hop producer with top 40 hits and high-rolling friends, what he's doing on social media that has people really taking notice. later on the show, the war of words between the donald d d

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yea, that feelin he's got hit records and famous friends. but tonight it's what dj ka led has done on social media that is getting him so much attention. abc's t.j. holmes went to miami to roll with the so-called king of snapchat for our series "social stars." >> they don't want us to smile. >> reporter: apparently there's a list of things they don't want justin bieber doing. >> they don't want us to eat cheesecake cheesecake. they don't want us to be successful. >> reporter: exactly who's they in the biebs another one of the big-name celebrities emulating this man, dj khaled.

want to finish you, they want you to lose. what we diagnose to do is be the greatest ever. >> who's the 3? who are they? >> they is basically the hater. the enemy. i don't entertain they. >> dj khaled! >> reporter: he's the hip-hop producer behind some of this decade's biggest anthems like "all i do is win." all i do is win-win win no matter what got money on my mind >> reporter: over the past few months his fame has skyrocketed. not because of his music. but because of 10-second videos like this -- >> you ever feel stressed out? get a haircut. >> reporter: on his snapchat account. every day ka led chronicles the minutiae of his life where pictures and videos are posted to a story and disappear after 24 hours. >> egg whites, turkey sausage -- >> reporter: from morning breakfast prepared by his personal chef, to elliptical talk.

being yourself. >> they don't want you to -- >> reporter: chill sessions with his superstar friends. at 40 years old, dj khaled has become the unlikely king of snapchat with over 6 million followers. "nightline" is along for the ride. many of khaled's snapchat stories revolve around life at his miami mansion where he lives with his fiance. >> it relaxes he when i water my plants, see the flowers grow, talk to the lion. lion order. lion. >> reporter: countless catch phrases. >> another one, just know. >> reporter: keys to success. >> right now on abc "nightline," major key, this is big. >> bless up. >> that's my everyday greating. bless up. >> special cloth alert?

alert, cut from special fabric, rare breed. >> some people when they see it and don't know you, they think it's an act, is he trying to be funny? is he putting on? >> definitely not an act. i want the world to know i'm super serious. and this is just dj khaled. >> reporter: ka led's massive snapchat audience equates to marketing gold. >> where more success comes you've got everybody coming. movie deals. tv shows. endorsements. >> reporter: he's already cashing in. recently debuting a line of merchandise called, what else, we the best. and earlier this month he signed an exclusive radio deal with apple music. a typical day includes a stop at finger licking, the miami restaurant he coowns. >> feels good to be a restaurant owner. it's part of my dreams of being the biggest mogul. winning to me is easy. winning more is the challenge.

this fan love, it's all over. i just snap something real quickish and right when i snap there was 2.27 million just off one snap real quick. somebody introduce you to fan love. fan love! >> reporter: no bodyguard. no entourage. just khaled. signing everything from sneakers to cell phones. >> thank you! >> reporter: his fans come from all walks of life. >> i'm like one of his biggest fans. >> it's my 21st and they don't want you to celebrate so you know what i'm going to do? celebrate with dj khaled. >> reporter: fan love getting out of control. >> i seen kids crying, man. crying, it change mid life. literally with tears in their eyes. it's like -- it almost made me cry. >> he estimates 50% of his current fan base are newcomers from snapchat. the other half long-time fans of

his first big billboard hit was 2007's "we taking over." he's created hits with kanye west and jay-z to name a few. >> singing the national anthem -- >> reporter: he brought us inside his we the best studio for a tour. >> a lot of the jay-z records. this went platinum. >> how do you describe yourself? some people can't figure it out. >> genius. a deejay, artist, producer, executive. i make hits, i find hits, i put hits out. i'm a music mogul. >> who are the theys coming at you these days? >> it confuses me and disappoints me when somebody says, what does he do? my records are some of the biggest anthems ever. what, they magically disappear? obama walked out to my record. >> how do you like my new entrance music?

>> reporter: a major moment in khaled's american story. born to palestinian parents in new orleans he cherishes his arab heritage. >> you can say i'm muslim, it's a way of life. i can't say that i follow completely perfect of the way i'm supposed to be doing it. but i know my heart is clean and i have a clean soul and i know got got me. >> is it upsetting to see some of the talk about possibly cutting off muslims coming into this country, things like that? >> when people say that, that's just ignorant. i promote love and peace. that's all i'm about. i'm taking over as principal for the day. school is like life. you will be tested. pass it. >> reporter: he continues to spread that signature khaled wisdom far and wide. shocking hundreds of middle schoolers with a surprise visit. >> i want to let y'all know i love y'all. for real. and i appreciate y'all having me here. >> reporter: before he left, you know he had to get that perfect

>> make some noise! >> reporter: for "nightline" i'm t.j. holmes in miami. next, guess who donald trump is sparring with now? a surprising papal intervention into american politics. e trade is all about seizing opportunity. and i'd like to... cut. so i'm gonna take this opportunity to direct. thank you, we'll call you. evening, film noir, smoke, atmosphere... bob... you're a young farmhand and e trade is your cow. milk it. e trade is all about seizing opportunity. when heartburn hits fight back fast tums smoothies starts dissolving the instant it touches your tongue

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y never ta finally tonight, donald trump has picked fights with fox news, john mccain, george w. bush, and the entire nation of mexico. and none of it seemingly has hurt his popularity. so what's going to happen now

the pope? donald trump has taken on plenty of opponents. but his latest beef might be the biggest yet. the donald versus the holy father. the pope was heading home after a trip to latin america when he was asked if an american catholic could vote for somebody like trump given his stance on immigration. he responded, "a person who thinks only about building walls wherever they may be and not building bridges is not christian." trump rarely one to turn the other cheek hit back, suggesting the mexican government was manipulating the pope. >> for a religious leader to question a person's faith is disgraceful. i'm proud to be a christian. they're using the pope as a pawn and they should be ashamed of themselves. >> reporter: he even said the pope should want him in the oval office. >> if and when the vatican is attacked by isis, i can promise you that the pope would have

donald trump would have been president. >> reporter: and at the cnn town halton night, trump not backing down. >> when you first heard the pope had said something about you that you thought maybe i'm going to have to ask for forgiveness? >> no, no. look -- >> reporter: one of his advisers pointing out on twitter the vatican is surrounded by barriers. the cover of tomorrow's new york daily news taking it several steps further with the headline "antichrist." trump, it's too early to tell whether this latest feud is going to hurt or help him. south carolinans will have their say this saturday when they vote. curiouser and curiouser. thank you for watching "nightline." tune into gma first thing in the morning. as always we're online 24/7 on our "nightline" facebook page and at abcnews.com.

good night. a crew braving bubbling hot lava to rappel into an african volcano. a cat is stuck in freezing weather for daze. >> 33-foot electrical pole -- >> see the heroes who jumped inn when the fire department wouldn't help. we are joined "right this minute" -- >> youtube star's interview with rtm is suddenly interrupted. what happens when a fan distraction turns frightening. bone nuts give-away day means your shot at a new ipad mini or flat screen tv. and meet gate who's letting his brother pull his tooth. >> wait, wait, wait, wait. >> psyching myself up. >> why there's a reason why you