Murder a mile away

Last week, on the way back from the gym (which is about a mile away), we noticed a news truck parked outside of an apartment complex. So we turned on the news, and found out there had been a murder. The first murder in our city in 3 years. A 21-year old woman was found dead in her apartment. Her family called the police after she didn't show up at Thanksgiving. And her 23-year old boyfriend with a criminal past was nowhere to be found. The suspect was found in Texas a couple days later, after setting his car on fire. We thought it was really stupid to do that, and bring attention to himself, but not complaining. One of his previous crimes was setting his ex-wife's car on fire.

The owners of the apartment complex are close to mom and dad, so we were able to get some of the inside details. Although I know a lot of the circumstances, it's not quite enough information for me to understand why the murder took place, other than it must have been an act of rage. This murder is distant from all logic. For example, if you want to kill someone, why are you dating them? Also, what good does it do to you or anyone by killing someone?