[the Deejay]

My guess is, Mark had been thinking about what to do to cover his lies and Lori finding out, what she said she was going to do, i.e., leave him, expose him, etc. All of which Mark wasn't going to be able to live with.

I do think he decided the best/easiest way to kill her and he followed through with the plan. Cold blooded.

[Lori675]

Police believe Lori Hacking's remains will turn up in a municipal landfill, where they planned to return Thursday night with a team of cadaver dogs.

It could take a month for police and dogs to plow through 3,000 tons of compacted garbage buried 20-feet deep over an area of two football fields.