this is "nightline." >> tonight, revealing their pain. >> no justice, no peace! >> trayvon martin's parents. their mission five years after their unarmed teenage son was gunned down in a case that put racial profiling, self-defense ask, state gun laws in the headlines. sparking a movement. >> i think that trayvon certainly ref-energized the civl rights movement in this country. >> has anything changed? >> it's very important that we continue this fight. >> plus where the buffalo roam. in the living room, of course. the family who has no problem letting their house-broken behemoth throw his weight around. >> he is my best friend. >> even stepping in as best man. how this wild thing became part of the family.

and behind the bachelor pad. the spectacular mansion where contestants compete for love, lust, and lots of roses. but when the cameras stop rolling, this place is also home to a real-life family. >> do they drain the pool for you? i hope so. >> but first the "nightline 5." >> incredible bladder protection in a pad this thin? i didn't think it would work. but it does. it's called always discreet for bladder leaks. the super absorbent core turns liquid to gel. i know i'm wearing it but no one else will. always discreet for bladder leaks. >> sick, huh? >> i'm good. i took new mucinex clear and cool. >> what is this uncooling thing happening? >> it's got a menthol burst. you can feel it right away. >> feel the menthol burst while powerful medicine clears your worst cold symptoms. >> number one in just 60 seconds.

good evening. the parents turning anguish into action. the death of their son trayvon martin sparked protests around the country and now, five years later, they're revealing how their pain has pushed them to become champions against gun violence. here's my "nightline" coanchor byron pitts. >> no justice, no peace! no justice, no peace! >> reporter: it's 9:00 a.m. on the sunny streets of miami gardens, florida. and an american rainbow, young and old, black and white, here to commemorate the life and death of trayvon martin. it was five years ago this month when 17-year-old trayvon martin, unarmed, holding a bag of skittles and the a bottle of iced tea, was shot and killed by neighborhood watchman george zimmerman. >> i still want justice for

trayvon. >> reporter: his parents leading the charge to stem the wave of gun violence. across america an average of 309 people are shot every single day. >> what's it say to you all these years later, people still come out like this? >> it shows how engaged everybody is. that everybody still want to be a part of the movement. >> reporter: zimmerman's subsequent trial and acquittal transfixed the nation. >> trayvon martin! >> reporter: spark the rallying cry we call black lives matter. >> there are many who say that trayvon martin became emmett till for a new generation of activists in our country. >> i think trayvon certainly re-energized a civil rights movement in this country. this was a child who lost his life to a senseless act of violence, gun violence, to someone who wanted to be a vigilante. >> reporter: tracy martin and sabrina fulton penned a powerful memoir called "rest in power: the enduring life of trayvon

martin," a retrospective look back at the son they raised and a tragic event that would change their lives. >> mom, your boy would be 22 years old this month. how are you doing? >> fairly well. i still have my good days and bad days. i still think about him and cry. i also think about him and smile too. >> you're smiling now. >> yeah. because i'm thinking about him. if he was still with us, that he would be graduating from college this year. >> he was very outgoing. outdoorsman, i used to call him. he loved doing things outdoors. so just to have his life cut short and taken away from him and not to see him continue to do the things that he likes, it was very devastating. >> reporter: that bullet from george zimmerman's gun pierced trayvon martin's heart and exposed an old wound in america's soul. >> we want arrests! >> reporter: with no arrests for six weeks, florida's controversial stand your ground law came into sharp focus. >> stand your ground lives enormous leeway to people like zimmerman to use deadly force if

they feel threatened. >> reporter: it divided our nation with many americans asking, what if zimmerman had been black? >> if a black man had come into a white neighborhood and gunned down a 17-year-old boy, all hell would let loose. >> reporter: and soon celebrities and everyday citizens made more than a fashion statement. they took a stand. the clenched fist of the 1960s was a hoodie like one worn by trayvon the night he died. culminating in the hoodie march in new york city. the message made its way to the white house. >> when i think about this boy, i think about my own kids. if i had a son, he'd look like trayvon. >> trayvon was dead on the ground at 17, unarmed. and he was given a drug and alcohol test and a background check, but the person who was shot and killed him, who was still holding the gun, he went home. my son went to the medical examiner's.

and this person went and got in his bed as if nothing happened. >> reporter: fulton and martin have painted a picture of the confusion and frustration that immediately followed. >> there was something else in the book i was struck by this notion that there's this 17-year-old boy dead on the sidewalk. police don't canvass the neighborhood, they don't knock on doors to say, is this your son? why not? >> i couldn't tell you that. when i returned to the residence that night, the crime scene tape had been taken down and there was no sign of any altercations on the scene. and so it still isn't clear to me. >> so trayvon was listed as what, initially? when they took his body in? >> john doe. >> we had to fight to get trayvon's body back so that we can ship -- have the body shipped home. we didn't ask for anything that any other parents wouldn't have asked for for a 17-year-old. >> reporter: once the zimmerman trial was under way a year later, martin's parents would face another difficult

challenge, facing the man who killed their boy. >> trayvon was no comparison to somebody that was 28 years old with a loaded gun. he was 17 years old, unarmed, and on the telephone at the time. >> not guilty in the george zimmerman trial -- >> reporter: zimmerman would walk out of that courtroom a freeman. >> of course we're shocked and disappointed. >> reporter: that not guilty verdict would mark the beginning of tracy and sabrina's new life as activists. >> trayvon martin was you! >> reporter: they founded the trayvon martin foundation at florida memorial university. >> everything in here is trayvon. >> reporter: sabrina spoke at the democratic national convention last summer. >> i am here today for my son, trayvon martin, who is in heaven. >> reporter: campaigned heavily for hillary clinton. she's even thinking about running for office herself. how does one go from being reluctant to even have your name mentioned in public because you are a grieving mom, to now being

someone who's considering running for office? >> i would not have imagined this but sometimes your life, you are dealt cards and the you need to make sure that you're playing the hand right. >> what do you expect from president trump? >> we don't know what his plans are for gun violence. we don't know what his plans are for the african-american community. >> are you optimistic? >> hard to say. it's hard to say. >> no justice, no peace! >> reporter: at the remembrance march there's lingering sadness over another more recent shooting. >> three teens were shot while walking home from miami carroll senior high -- >> reporter: hours later, in the same neighborhood, three teens shot on their way home from school in a drive-by shooting. part what was seems to galvanize people in this movement, it was a white guy accused of killing a black teenager. what happened here last night most likely was black on black. >> we know that black on black crime is plaguing our community. it's something that we have to deal with as citizens.

just have to work at it piece by piece by piece. >> reporter: a cruel irony depicting the ugly cycle of gun violence in this case, all three teens are expected to make full recoveries. >> i would imagine that knowing that your son is the face of a movement has to energize you in some way. but i would also mention, it can be a tremendous burden, yes? >> i would much rather prefer my life as it was. to have both boys here, to just be going on vacation and going to work every day, and them going to school. but i know that it's not just about trayvon martin, it's about so many other trayvon martins. it's about our young ladies being shot and killed. it's about our teenagers being shot and killed. men being shot and killed. so it's so much bigger than trayvon that we really didn't understand initially, but i think we kind of get it now, that it's very important that we continue this fight. >> reporter: for "nightline,"

i'm byron pitts in miami. next, we switch gears and meet wild thing. how a 2,500-pound brawny bison became a house pet. why his owner says he couldn't picture life without him. later, when buxom bachelorettes aren't frolicking around, this is home to a real family. what it's like to live in the "bachelor" mansion. ♪ ♪ whether you're after supreme performance... ...advanced intelligence... ...or breathtaking style... ...there's a c-class just for you. decisions, decisions, decisions. lease the c300 sedan for $389 a month at your local mercedes-benz dealer. mercedes-benz. the best or nothing. does your child need help with digestive balance? try align junior probiotic. so she can have a fraction dominating... status updating...

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i speak from personal experience when i say that having three cats, steve jess and ruby, requires a lot of

care, feeding, hairballs and work. imagine having a two and a half ton bison barreling around your house. here's my "nightline" coanchor juju chang. ♪ >> turn your head, you're is big to come through straight. >> reporter: he's not your average house pet. with a face only a mother could love. >> hello, sugar boy! >> reporter: yep, that's sugar boy. a full-grown bison. >> he's approximately 2,500. his head probably weighs 400. >> reporter: he lives inside with his owners. >> he's never stepped on my teet. >> reporter: ron and sharon bridges. >> this is a natural thing. you let your kids in the house, you let your dogs and cat in the house, why not wild thing? >> reporter: yes, this darling domestic is named wild thing. ♪ wild thing >> while we were walking down the street one day, my daughter and i, we come back to the house and we said, we got the name for her, the buffalo.

my daughter says, wild thing! wild thing has stuck. just like the song. >> come on, little man. >> reporter: billy crystal couldn't help but bring norman home in "city slickers." >> everyone, this is norman. >> you're going to put him in the van? >> oh, yeah. and then in the bed. >> reporter: ross played host to a friendly primate in manhattan. >> it will be nice to get this off finally, won't it? or we can leave it on. >> reporter: it's not just horld. wild thing proving that everything is bigger in texas. the tall tale started 11 years ago when ron bridges, a self-described rodeo clown, and long-time rancher, lost vision in his left eye. >> had to sell everything we had. horses, cattle, and a herd of buffalo. >> reporter: ron says he kept wild thing around in hopes his son would follow in his footsteps. >> wild thing, he wouldn't ever calm down, he'd keep horning us and kicking us every day. >> reporter: with some persistence and a whole lot of

tlc, ron made white thing into a downright softy, aided in part by an offbeat gill trick his wife. >> we brought him in, took some pictures to send to friends in europe that we wanted to show them. but i got to noticing he didn't use the bathroom in the house. >> reporter: sharon got to thinking, why not make this a permanent thing? >> why don't we do something different, bring wild thing in the house. he goes, you don't understand, he's a bison, you might not have a house left. and i said, well, you only live once, let's do it. >> reporter: a real-life bull in a china shop, if you will. >> he didn't tear up anything in the house. we just started leaving the door open. and he started coming in and out when he wanted to. >> reporter: since then, wild thing has been through it all. even stepping in as best man. as the couple renewed their wedding vows. >> i couldn't picture life without wild thing. he is my best friend. and i enjoy just being with him. one thing about him, you know

he's not like a dog. you've got a dog in the house, you may trip over it. you'll never trip over a buffalo. >> reporter: a fair point. he's hard to miss. bison are the largest land mammal in north america. and can be dangerous. >> we were fixing to be tramples. >> 2015 this bison selfie went horribly wrong, brandy tossed into the air when a bison caught up with her. >> it happened so fast but seemed like it took forever. it was quite painful. >> reporter: 2015 alone, five people were attacked by bison at yellowstone. the park telling us these animals can sprint three times faster than humans can run. >> can you get through? >> reporter: ron acknowledges this is not a pet for everyone. >> no way i'd recommend a buffalo as a house pet except to somebody that's been around cattle a lot. i was a rodeo clown for 12 years. and somebody that's experienced with wild animals and that can handle them. >> come on, wild thing. >> reporter: he's one of the

biggest but wild thing is not the first unusual house pet to catch national attention. at 650 pounds, esther the wonder pig is the very large bundle of joy her parents derek walter and steve jenkins never knew they wanted. >> we got her a few years ago, four years ago, expecting a mini pig, we were told she'd be 70 pounds full sized. and we ended up getting completely taken for a ride. turned out esther was actually a commercial pig. >> reporter: and she is one smart piggy. she opens the freezer. >> that's from her. using her snoot to get in there. >> reporter: works the front door and eats whatever her dads are eating. >> oh, she wasn't paying attention. >> i know, i know. >> reporter: her parents acknowledge their very large house guest comes with a unique set of challenges. >> pig's natural instinct is to root up their bed to make them fluffy. we go through a mattress every two months.

>> reporter: because everyone loves an underdog, or pig, esther is a social media celebrity with more than 300,000 instagram followers and more than 1 million likes on facebook. her popularity grew like her waistline, which her dad styled in a mu mu or a tutu with the caption, i tried ballet once, it wasn't really my thing. you won't see wild thing in a tutu any time soon. but if you're driving down a country road in texas you might spot this very unique all-american family in action. >> he is my baby. and i know he's a giant, but to me he's still a baby. >> reporter: for "nightline," i'm juju chang in new york. next here, you know it as the spot for canoodling, carousing and more. but meet the real-life family that calls the "bachelor" mansion home. how do you become america's best-selling brand? you're not going to make it.

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finally, when the bachelors and bachelorettes move in as seen right here on mondays on abc, a real-life family moves out.

>> reporter: stars of this season, both topless. i had no idea in the offseason a regular family lives here. in the "bachelor" mansion. do they drain the pool for you before? i mean, i hope so. >> no, it's not contaminated like that, no. >> reporter: marshall haridan's show is a hit star of the franchise. marshall, a contractor who built this place himself, isn't a superfan. his daughter jessica might be. >> you like chad? >> i love chad. >> reporter: chad johnson, season 12, bachelorette. she bumped into him at a hotel. >> did you tell him this is your house? >> yeah, that's probably the only reason he talked to me. >> reporter: fans do come calling. >> depends how he's feeling. >> yeah, yeah. >> sometimes he's not having it. turn them out. >> other times, yeah, come on in. >> reporter: there are enough bathrooms for everyone to cry in. 10 years, 22 seasons, nearly 50

coats of paint on these walls. oh, if only they could talk. >> those are permanent pieces to hold up the lighting. >> reporter: one of the few offseason reminders of celebrity. twice a year this family moves out completely for about six weeks. >> pack it up. >> everything? >> everything. >> reporter: in come a horde of want to be brides, grooms, stars. >> i wouldn't want 25 frisky people staying in my house. >> apparently some of them aren't frisky. >> reporter: he definitely doesn't watch the show that much. i'm nick watt for "nightline" inside the "bachelor" mansion. >> our thanks to nick watt, our thanks to you for watching abc news tonight. "gma" first thing in the morning and online 24/7 at abcnews.com and our "nightline" facebook page. thanks again for watching and good night.