The Square Root of Murder (Professor Sophie Knowles)

worked in stood there, same as always, red brick, one big solid figure shaped like an L with a slightly thicker short side. I saw no crime scene tape on the outside of the building, and no police presence. Had the facility I called home already been cleared by the police? All the better for them to be able to concentrate on interviewing people. Lucky for me.
    I got out of my car and walked slowly up to the building. With every step I had to remind myself that there was no longer a dead body on the fourth floor. That didn’t mean there was no one lurking on the first floor—my floor—however. I scanned the windows, not knowing which I preferred, signs of life or of emptiness. All that reflected back to me were the stark rays of the sun.
    I climbed the stately steps under the clock tower, fumbling for my key to the large, heavy front door. I couldn’t remember the last time I’d had to use it. I was almost never the first one to arrive. I preferred late morning classes and had the seniority to make the schedule work for me. When I did drop in on an occasional Saturday, I’d find at least a few people, students or faculty, cramming in the science library or grinding out what they hoped would be useful data in one of the labs at the last minute.
    Not today. Inside, the building was as creepy as I thought it would be. The interior hallways were always relatively dark, and even more so now since Woody drew all the shades in the labs and classrooms in the summer. The contrast with the glaring sunlight outside blinded me for several seconds, the short fluorescent light in the display case at the entrance offering very little help. I wished I had Bruce’s fifteen thousand dollar goggles.
    I half expected to see Keith walking down the corridor toward me with his quick, purposeful stride, calling out a greeting then immediately engaging me in a discussion of a contentious issue. Faculty perks, student government representation on faculty committees, science requirements for humanities majors. Not even the choice of graduation speaker escaped his scrutiny. Of all the faculty, he’d be the one most likely to be here on a Saturday or Sunday. He’d be in a trademark striped shirt, long-sleeved in the winter, short-sleeved in the summer. His light brown hair would be neatly combed and his shoes polished. Never in a T-shirt as the rest of us would wear on an off day; never in jeans.
    I regretted all the times I’d joined in making fun of his narrow wardrobe choices, and would have given anything to have him back.
    Rachel’s presence was here today also. She’d taken it upon herself to manage the glass-fronted display case, the first thing a visitor saw upon entering the building. It had gone for years with yellowed construction paper stapled to the back, broken pushpins holding a wildly out-of-date class schedule and various illegible notices, and an array of deceased insects on the ledge at the bottom.
    Rachel had cleaned it all out and made a banner for the top of the case, an attractive photo presentation of the people and facilities of the four Franklin Hall departments. She’d stripped out the old construction paper and installed a clean corkboard. The former eyesore was now an inviting source of information that everyone checked on a regular basis.
    This week she’d posted what looked like an oversized scrapbook page about a group of high school seniors who’d spent a week in a special program to prepare them for their first college math classes. She’d arranged photos, problem sheets, and contact information, along with souvenir ticket stubs from a performance they’d all attended. I studied Rachel’s image in a photo of her in the student lounge with a crowd of teenagers around her. She was smiling broadly; it was clear they loved her.
    I knew if she’d been able to, Rachel would already have put up photos from yesterday’s party for the new Dr. Hal Bartholomew.
    This was not the profile of a killer.
    I had no desire to check in at my own office. I wanted to get in and get out of the building in a short time to minimize the chances of meeting danger, that is, coming upon a killer. Never mind that it made no sense that he’d still be hanging around. I had to admit also that I was a little creeped out at the possibility of finding an unwelcome something, or someone, on my own office floor.
    I needed to get up to the fourth floor. My quandary: take the elevator or use the stairs? Ordinarily, unless I was