Help with the investigation for Taemon Blair

My mom, Taesha Hunt, had 7 kids. 3 of those kids, sadly, are now dead. She had 5 boys and 2 girls. 2 sets of twins. Me, Dadriane. A'Janae, which is one of the girls who died. Dontae and Dajuan, which are the first set of twins. Taemon and Xaveria, which are the second set of twins. Both are now dead!!! Lastly, the youngest brother Izairreya. A'janae died.Then Xiviria was born along with Taemon, but they were born early. Xaveria was undeveloped, while Taemon had developed more than his twin. She didnt make it, and he did. He was a strong little fellow. He grew up to be 6'5!!!! A tall handsome young man. He lived for his lost twin and did everything in the name of her! All of our lives we’ve had to struggle. In and out of foster homes, and group homes. Taemon went through a rough patch in his life. He went to jail for a year. When he got out he promised to change his life. He went and got his diploma. He had straight A's in HS. He has always been on the A honor roll.  My brother finally got his life on track! He has a beautiful girlfriend. He also was having a baby.  He landed a job driving 18 wheeler trucks. He went on the road to make money for his family. Now graduated with straight A's, and a really good job, he was on the track of becoming a great man. 
Unfortunately Taemon died yesterday morning. There was a coworker that works where Taemon worked. That co worker walked to teamons truck and seen his body hanging in the cab of the truck from his neck. The job immediately thought he committed suicide. So the coroner looked on Taemon's social media because they didn't know who to call, and found our youngest brothers number on Taemon's Facebook. gave him a call and told him what happened. He immediately called our mom, Taesha Hunt, and put her on a 3-way call. Once she found out the news, she screamed and cried for hours. My little brother then called me and told me the news. I didn't believe him, I just couldn't. I had him call the lady in the coroners office so that I could talk to her myself. She told me exactly what she told my mom and my little brother. I instantly started crying as well. But something in my heart told me that he didnt commit suicide. He was 6'5, I thought to myself, how could he hang himself inside of a truck when he's so tall. This is sooooo devastating for our family. So unexpected! Our "Duke" is gone!!!! Duke was his nickname that we called him ever since he was a baby. The only basketball team he would watch with his dad was Duke University  because of the blue color they wear. He loved blue. 
If this wasn’t a suicide, I really hope that the police will find who killed "Duke"!
He needs justice!
We don't have money to have a funeral for him, or pay for a casket.
If anyone could help, We would appreciate it greatly! Even the smallest amount could help! Thank you for showing your concern, our family appreciates anyone's help.
I,his eldest brother, will be in charge of the expenses!
We love and miss you Duke!!! I will meet you again someday! Until then say hi to Nae Nae, and Xaveria!!!