FLINT, MI – His keys, car, money and clothes were left in his East Lansing apartment untouched, as if Henry Baltimore Jr. had vanished without a trace. Now, 41 years later, his family is reaching out to the public in hopes that someone will come forward with information on his disappearance.

Henry Baltimore Jr. was a 21-year-old drum major at Michigan State University where he was majoring in music in 1973 when he disappeared. His sister Lural Baltimore and brother Lonnie Baltimore, of Lansing, said he was a leader, yet a fun-loving young man. Lural said the past 41 years not knowing what happened to her brother have been devastating to her family. She said both her parents died not knowing what happened to Henry.

"I think it has had a devastating effect on our family. Particularly my father and my mother because they were so hopeful that someday we would know something and always told us to keep the faith that he would one day walk through the door with his smiling face and say 'I'm home.'" Lural said. "But that never happened. It's just been a hole in our heart that we've never known exactly what has occurred with him."

Baltimore went missing May 30, 1973, after he was set to testify in the case of a Flint man accused of robbing him at his apartment earlier in the year.

East Lansing Police Lieutenant Scott Wriggelsworth said Henry Baltimore was robbed in March of 1973 at gunpoint inside his apartment in East Lansing on Oakhill Drive.

Wrigglesworth said it took Baltimore a few days to report the robbery. A Flint man was identified as a suspect and charged in the robbery, he said.

Just before he was to give testimony in the Circuit Court arraignment on May 30, 1973, Baltimore went missing, and was never seen again.

"Forty-one years have passed and we still don't know where Henry's at and we haven't been able to prosecute his killers. One of the things we're doing today is asking for the Flint area and Genesee County's help in two things – my main goal is in this case far and above anything else is to find Henry," Wrigglesworth said.

"My main goal is to find Henry, we're asking for the public's help in that. There's no doubt in my mind that several people were involved in Henry's disappearance were from the Flint area at the time and there may be people from the Flint area that know where Henry's at, or who did what to Henry."

Lural Baltimore knew something was wrong when she tried to get a hold of her brother that fateful night in May. The siblings were both attending MSU together at the time, moving from their home in Jackson and having separate apartments in East Lansing. Lural Baltimore was a graduate student and Henry Baltimore was a junior. The night Henry Balitmore went missing, Lural Baltimore said she was typing up his final paper for him and needed to drop it off to him. When he didn't show up, she said, she called him and his roommates said he hadn't been home all night.

"The assumption was made that he had just disappeared on his own, but we knew in our hearts that couldn't have happened, knowing how close we were as a family and just the fact that everything was still there. So we assumed that something must have happened to him," Lural Baltimore said. "We contacted the police and then when I had to contact my father, it had a tremendous impact on us as a family, my father being a former marine was a very strong man, that was the first time I ever saw my father actually break down and cry, just knowing that something must have happened to his son. That just had a devastating impact on the family."

Lonnie Baltimore said the past four decades have not been easy for him, as his older brother was his role model and someone he always looked up to. He said he prays and holds out hope to see him again.

"We live with it every day that goes by and we think about it, we pray every day that he will come through that door and say 'I'm here.'" Lonnie Baltimore said. "But all we have is memories and we're asking you if you know anything, please come forward. That's all that we can ask for."

Crime Stoppers is offering a cash reward of up to $2,500 for information that leads to an arrest in the disappearance of Henry Baltimore Jr.

In addition to the cash reward offered by Crime Stoppers, Wrigglesworth said the City of East Lansing and MSU are each offering a $5,000 cash reward for information.

"Both the City of East Lansing and the Michigan State University are offering a $5,000 reward each for information that leads to finding Henry or prosecuting his killers," Wrigglesworth said. "So on top of the $2,500 reward being offered by Crime Stoppers, The city and the university are both offering up additionally for this case. So if you know something, say something and you can remain anonymous through Crime Stoppers. Please help us finally resolve this case and find Henry and potentially prosecute his killers."

Wriggelsworth said the Genesee County Sheriff's Department, the Ingham County Sheriff's Department, the Flint Police Department, the East Lansing Police Department, the Michigan State University Police Department, and the Michigan State Police are all engaged in the investigation.

To submit an anonymous tip call Crime Stoppers at 1-800-SPEAK-UP, or text CSM and your tip to CRIMES (274637) or online at www.1800speakup.org.

Amanda Emery is a police reporter for MLive-Flint Journal. Contact her at aemery@mlive.com or 810-285-0792. Follow her on Twitter or Facebook.