He and his younger brother Steve were known affectionately as the "Bruise Brothers", as they rose from Sarnia's gyms to the top of Canada's amateur boxing ranks in the late 1990s. Both of them were educated at Sarnia's Northern Collegiate Institution and Vocational School (N.C.I.V.S.) Molitor shot to fame at the 1998 Commonwealth Games held at Kuala Lumpur. There, he won the Welterweight (67 kg) title, defeating Absolom Okoth of Kenya 14–9 to claim the gold medal.
Afterwards, he was considered a celebrity in his native Lambton County. He dropped the puck for an OHL game between the Sarnia Sting and Kitchener Rangers held in Sarnia, and had some minor sponsorship deals.
Molitor narrowly failed to qualify for the 2000 Summer Olympics and his career took a major downturn from that point, as he battled addictions to cocaine and alcohol and failed to maintain his former training regime. He tried moving to Toronto for several months to train with his up-and-coming brother, but his personal problems continued.
On May 4, 2002, five months after moving back to Sarnia, he confronted his ex-girlfriend, 21-year-old Jessica Nethery, in a parking lot and stabbed her 58 times. She bled to death in her red Pontiac Grand Am. At the time, Molitor was under a restraining order to stay away from his former girlfriend, who he had previously abused. Molitor was also listed in police reports as being under the influence of drugs and alcohol at the time.
In December 2004, Molitor was convicted of second-degree murder, and the following May was sentenced to life in prison with no chance of parole for 14 years. With credit for time already served he can apply for parole in 2016.