text: The adoptive grandparents of a Texas toddler who died after a brutal beating last month are speaking out against the boy's mother, who they say didn't do enough to protect her son from her boyfriend. Christian Tyrrell, 22, was arrested Wednesday on capital murder charges in connection to the March 19 death of 2-year-old Adrian Langlais, the son of his girlfriend Jessica Langlais. John Winkler and Laura Martinez considered themselves Adrian's grandparents, even though they weren't blood related to the little boy. Martinez's son - Winkler's stepson - started dating Langlais when she was six-months pregnant with Adrian and they continued to babysit the toddler when the two eventually broke up. In a heartbreaking interview with the Star-Telegram, the couple said they started noticing bruises on Adrian last fall, when Langlais started dating Tyrrell, and say the mother ignored them when they voiced concern. Eventually, they reported Adrian's injuries to Child Protective Services, but the agency closed the investigation in February, ruling out abuse from Adrian's parents or Tyrrell. A little over a month later, Adrian was dead. Scroll down for video . Abused: Christian Tyrrell, 22 (left), was arrested Wednesday on charges of murdering 2-year-old Adrian Langlais (right), the son of his girlfriend Jessica Langlais (center) Now Winkler and Martinez, who are now separated but remain friends, are working together to bring justice for the boy they considered family. While they are happy to see Tyrrell's arrest, both want CPS and Langlais held accountable for the role they played in Adrian's death. 'They left the child vulnerable. They made that decision and they made the wrong decision,' Winkler told the Star Telegram. Winkler and Martinez first met Langlais in late 2012, when she started dating Martinez's son. At the time, she was carrying Adrian, her son with former boyfriend Ulises Hererra. When Langlais gave birth three months later, Winkler and Martinez considered Adrian their grandson and started babysitting when his mother went back to work. At one point, Langlais broke up with Martinez's son and briefly got back together with Adrian's father. All the while, the couple continued their relationship with Langlais in order to be a part of Adrian's life. But last fall, both became seriously concerned when they noticed bruises and other injuries on the little boy's body after Langlais started dating Tyrrell. Adrian (right) died in the hospital on March 19,  the day after his second birthday, from head trauma. Tyrrell (left) has been accused of causing those injuries . 'I start noticing a change in Adrian's behavior,' Winkler said. 'He's starting to hit me in the face. Sometimes when she brings him over, he's like in shock. … He clings to me. I'm telling her [Langlais], "I don't know what the deal is but there's something going on here."' When they told Langlais about the marks, she dismissed them saying he got them roughhousing with some other children at Tyrrell's mother house. After highlighting the injuries with Hererra, the boy's biological father, and a lawyer, the two decided to go against Langlais' wishes and make a report to CPS on December 23. Three days later, they became even more concerned when Tyrrell came over to their house to pick up Adrian, and the boy appeared scared to leave. 'He immediately ran to me, grabbed me … and was holding on,' Winkler said. 'He would look over and look away from him, and he started crying. He dug into my arm with his little fingernails so much it broke the skin.' And then Tyrrell became angry when Winkler told him he would drop the boy off himself when Langlais got home. Winkler says Tyrrell went straight to Langlais' work, and she started sending Winkler a slew of text messages, chastising him for not handing Adrian over to her boyfriend. Laura Martinez (left) and John Winkler (right), who consider themselves adoptive grandparents of Adrian, say they started noticing bruises on the boy in November, when Langlais started dating Tyrrell . 'John you can't make decisions like that. I am his mother,' Langlais texted Winkler, in messages he shared with the Star-Telegram. 'And if you keep this up I'm gonna have to make other arrangement for Adrian.' Winkler went on to say that he loved Adrian and was just trying to do what's best for the boy. 'John I don't appreciate you insinuating that Christian is harmful to me and my child, Christian loves Adrian and is really good with him,' Langlais continued . 'Adrian is frightened of him, that is a fact … I am concerned you do not realize it,' Winkler replied. 'That's your opinion. Please mind your own business,' Langlais said. Shortly after that, Langlais banned Winkler from spending time with Adrian. Winkler says CPS never called to interview him after he reported the potential abuse at the end of December, and says he had to follow up in order to speak to an officer about his concerns. In a meeting on February 9, a CPS worker assured Winkler that the family was under investigation. But shortly after, the case was closed and Adrian's parents and Tyrrell were cleared of any wrongdoing. Winkler (above) made a report to Child Protective Services at the end of December, but the case was closed in February with Adrian's parents and Tyrrell being cleared of any wrong doing . Then, just a month later on March 18, Adrian's second birthday, the boy was rushed to the hospital after seizing in Tyrrell's care. Healthcare workers at the hospital reported that the boy showed signs of severe head trauma including multiple skull fractures, bleeding on the brain and swelling around the eyes, neck and head. There was also bruises and bite marks on his body. He died the next day. In separate interviews with police, both Adrian's mother and Tyrrell  said that the boy started acting strange the day before, after Tyrrell put the boy in a time out for not eating his lunch. Langlais says she heard Tyrrell yell at the boy after taking him into another room where his playpen was, and that Adrian immediately stopped crying or making noise. 'You need to start acting better. You know you need to eat,' Tyrrell says he told the boy, according to police. He added that Adrian was 'pretty pissed' off after being spanked and put in time out. Langlais says her boyfriend went back into the room about 10 to 20 minutes later and when Adrian was brought out, he had bruises on his face and his eyes kept rolling back. Tyrrell told his girlfriend and police that when he went back into the room, he found Adrian laying on the ground outside of the playpen as if he had crawled out and fell backwards. That night, Langlais says her son vomited and had a hard time standing on his own. And when she tried to feed him a slice of banana the next morning, he couldn't keep food down. She last saw Adrian when Tyrrell dropped her off at work around 10:30am and the boy was leaning his head against the side of his car seat 'like he couldn't move it' and only opened his eyes when his mom came to kiss him goodbye. Tyrrell's version of events differs slightly from Langlais', in that he claimed the boy could stand up and was acting normally after finding him on the ground next tot he playpen.  He does admit that the boy later vomited and appeared 'sleepy' but says the next morning Adrian was awake, talking and 'having fun'. While Winkler and Martinez are happy with Tyrrell's arrest, the two say they want to see CPS and Langlais held accountable for the role they plated in Adrian's death . Internet searches reveal that Tyrrell was more concerned that night than what he descirbed to police. Just after 11pm on March 17, someone searched on his phone 'how to tell if someone has went brain dead'. Similar searches continued that night and into the next morning, about head injuries, concussions, and 'toddler can't walk or use right side after hitting head'. After dropping Langlais off at work, Tyrrell says he played with the boy back and home. Around 1pm, 14 hours after his first suspicious cell phone search, Tyrrell called 911 and told a dispatcher that he saw Adrian 'stagger', fall and then roll his eyes. On Wednesday, Tyrrell was arrested on capital murder charges for allegedly inflicting injuries that caused Adrian's death. He is currently being held on $1million bond. In an attempt to bring Adrian'smother and CPS to justice, Winkler has created a Facebook page and written to multiple local politicians. While he is sad to lose Adrian, Winkler says he is comforted by the fact that the little boy can no longer be abused. 'To know he's gone is breaking me,' Martinez said in a recent interview. 'But on the other hand, I'm happy because he's not here anymore. He didn't deserve the life these people were giving to him. I'm glad he's with God.
target: Adrian Langlais died on March 19, the day after his second birthday, from head injuries allegedly caused by his mother's boyfriend Christian Tyrrell .
  The toddler's adoptive grandparents say they started noticing bruises on the boy in November, when mother Jessica Langlais started dating Tyrrell .
  They say Jessica ignored their warnings, and that Child Protective Services cleared Tyrrell of any wrong doing a month before Adrian's death .
  Tyrrell was arrested Wednesday on capital murder charges and is being held on $1million bond .