00:01Austin 911.
00:03My friend is laying on the bathroom floor.
00:06It's hard kind of reliving it.
00:10She was a once-in-a-generation athlete.
00:13You see a bike? No bike.
00:16She had that sense of urgency underlying everything she did.
00:20There's blood everywhere.
00:22Is she breathing? No.
00:24Somehow her soul knew that she had less time than most people.
00:31There was no forced entry into the residence.
00:34It could have been a home invasion, a robbery.
00:37But the more we started digging into it,
00:40it became likely that something else was going on.
00:43Colin Strickland was the last person to see Mariah alive.
00:47Colin? Yes.
00:49Do you own any firearms?
00:50I bought a pistol, and I actually never shot it.
00:54Nobody could figure out a reason
00:56why somebody would want to kill this person.
01:00Grief is like a big mud puddle.
01:02I feel a lot of guilt.
01:04I told her mom she was okay and in good hands.
01:08From Colin's phone,
01:09we realized he had Mariah in as Christine Wall.
01:13This was the area not swapped for DNA.
01:17It raises all these questions of like,
01:18do you ever really know anyone?
01:20I said the only person I could think of that didn't like her was...
01:31I said the only person I could think of that didn't like her was...
01:39but I didn't like her.
01:41I didn't even know her.
01:42I said the most important thing?
01:42She was right.
01:42She was like,
01:42she's probably not the only person I could think of
01:43but she was like the only person I could think of who's going to...
01:45but she was really exactly the person.
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