Do a search on officer
Timothy Mossbrucker. You are correct about the engine block, he was struck by a .50 caliber bullet through the windshield.
I lived in Littleton when it happened and it was a big deal. I remember the news speaking about a bullet that past through part of the engine block, but several shots were fired and the fatal bullet did pass through the windshield. It was back in 95 and I've slept a lot since then. Memories get blurry.
Edit: This is a memorial page http://www.odmp.org/officer/815-sergeant-timothy-michael-mossbrucker
On April 28, 1995, Albert Petrosky walked into an Albertson’s grocery store in suburban Denver, Colorado, and gunned down his estranged wife and the store manager. Armed with an L.A.R. Grizzly 50 caliber sniper rifle, an SKS Chinese semiautomatic assault rifle, a .32 revolver, and a 9mm semiautomatic pistol, Petrosky then walked out into the shopping center parking lot, where he exchanged fire with a federal IRS agent and killed Sgt. Timothy Mossbrucker of the Jefferson County Sheriff’s Department. Petrosky, who was known to his friends as “50-cal Al,” fired all four weapons, including the 50 caliber rifle, during his murderous rampage. (”Authorities Investigate Gun Sale: Rifle Used in Albertson’s Slayings Wasn’t Illegal,” Rocky Mountain News, May 1, 1995)