Texas 17-year-old Jake Evans still doesn't have an explanation for why he shot and killed his mother and 15-year-old sister.

When he called 911 and confessed to the crime, he said he hadn't even been angry with them at the time of the shooting, but that it's something he had been vaguely planning for some time.

I am pretty, I guess, evil ... whatever. I don't know … it's weird. I wasn't even really angry with them. It just kind of happened. I've been kind of planning on killing for a while now.

While Evans did call himself evil, he didn't express much remorse for his actions. Instead, he wondered if he'd suffer from nightmares after witnessing such brutal violence. He even asked the 911 dispatcher what medications he could take to prevent reliving the murders.

I'm really worried about, like, nightmares and stuff like that. I don't mean to sound like a wimp or anything, but this is, wow, I've never, like, done anything violent in my whole life.

As for a motive, Evans said only that he doesn't like other people's attitudes, because they're "verbally rude to each other and stuff like that." He did not say his mother and sister were fighting when he shot them.

Evans has been charged with capital murder and is being held without bail.

[Image via Parker County Jail]