A Maltese man whose son died without fulfilling his dream of becoming a policeman, has built a mobile memorial to fallen policemen.

Tony Massa, a resident of Milforn, Michigan, wants to make sure the sacrifices of fallen police officers are not forgotten, Milford media reported..

He became involved with numerous police after his son, Mark, was killed by a drunken driver near the family’s home in 1993.

Mark Massa had planned to be a police officer.

After the case, Mr Massa began speaking to high school students around the country about the dangers of impaired driving.

He has now built a memorial on board a trailer, dubbed “Officer Down Memorial,” which lists the names of seven Michigan police officers killed in the line of duty since 2000.

He’s also planning to install a video screen inside the trailer, which he’ll use to show a film about the officers.

“It’s my way of showing my appreciation for what they do,” Massa said.