The nephew of Dorchester resident Robinson Lalin, who was dragged to his death by an MBTA Red Line train, is searching for answers following the tragic accident, saying he hasn't "heard a word" from the transportation authority.

"That's what eats me the most because it's at their hands, my uncle's blood is on their hands. I haven't heard a word from the MBTA. They have my number, everyone has my number. I've heard from everyone except them," Kelvin Lalin told Jim Braude on Greater Boston.

Robinson Lalin was killed earlier this month when his arm got caught in the door of a Red Line train and he was fatally dragged. Further details of what went wrong haven't been released, and the incident is under investigation.

Kelvin Lalin said he asked the MBTA for video from the Broadway T station where his uncle was killed and has not received a response.

"I want clarity, you know, I want someone to speak to my family and give us something ... have some type of condolence or let us know what happened," Lalin said.

An MBTA spokeswoman told GBH News in a statement, "Implored by the NTSB to not make comments regarding any elements of the ongoing investigation, the MBTA will continue to respect the federal agency's directive."

With regard to safety, she said, "The Red Line cars and all of their components, including doors, are safe. Red Line trains make hundreds of daily trips, carrying tens of thousands of riders every day without incident. MBTA vehicle maintenance personnel work around the clock to keep the Red Line fleet operating in a state-of-good-repair while hundreds of new Red Line cars are delivered. Regularly scheduled inspections of subway cars include the testing and maintaining of door components."

Lalin said his uncle was loved by family and friends and was always smiling. The two were close in age, and Lalin said they grew up more as brothers than as nephew and uncle.

"I lost a brother. Especially in this form, this matter, I have no answers. Nothing. I feel like I'm being ignored. I feel like it's been, you know, just put under the bridge, swept under the rug," Lalin said. "You know, we're restless at the moment."

Watch: Family of Dorchester man killed on MBTA seeking answers