Calleigh tossed and turned for most of the night, but finally sank into a deep sleep a few hours before she had to get up to get ready for work.

Calleigh received her coffee order when her cell phone rang.

"Duquesne." Calleigh answered.

"Cal, it's Speed. There was a shoot out in an alley, one dead. Lots of bullets."

"Sounds like my kind of case. Where?" Speed gave her the address. "I'll be there in ten minutes." She hung up.

"You weren't kidding when you said there were a lot of bullets." Calleigh said as she surveyed the scene.

"I wouldn't joke about something like with you." Speed smiled. "You take the bullets and the casings and I'll take everything else?" He proposed.

"Works for me. This could take a while."

"We've got all shift. H said he and Eric would handle everything else." Speed replied.

"You've spoken to him this morning?" Calleigh questioned.

"I went in early to finish my report." Speed explained. "Did the two of you work things out?"

"He's thinking over my research proposal." Calleigh replied.

"Is that some kind of euphemism?"

"Yes." Calleigh acknowledged. "I told him where I stood and we were interrupted before I found out his perspective."

"I see."

"He's had twenty-four hours; he gets another twenty-four before I take Alexx's suggestion." Calleigh said.

"What did Alexx suggest?" Speed asked.

"Get her to tell you her caveman theory one day." Calleigh smiled.

"Caveman theory?"

"Well technically I would guess it's cavewoman theory but it's an interesting idea. We have a crime scene to process."

"Ladies first." He said lifting the crime scene tape for her.

"Ever the gentleman."

"How's it going?" Speed asked Calleigh, he'd finished process his part of the scene.

"Four guns. One fully automatic machine gun, see where the bullets struck the wall in a sweeping curve."

"They've got to be over seven feet up." Speed commented. "So either one off them was giving a run for the tallest man, or it was a warning."

"Very good." Calleigh said. "That would be my interpretation too. If you're done you can help me extract them while I get the lower ones, I've already bagged all the cases and bullets that it the ground."

"Okay."

Calleigh sighed and rubbed her eyes. She'd been running the 103 bullets, matching which ones came from which gun, ever since she got back to the lab.

"Tough day?" Eric asked walking in.

"Oh hey Eric." Calleigh looked up.

"You look tired." Eric said.

"I love my job, but spending hours looking down a microscope can be too much sometimes."

"How do you feel about Mexican?" Eric suggested.

"As in food, I love it why?"

"Speed and I are headed to the Mexican restaurant for lunch; we wanted to know if you wanted to come."

"I need to put these away first."

"Speed has to finish running a test anyway, so we'll meet you in the parking lot in twenty minutes."

"Sounds good to me." Calleigh smiled.

"And maybe you can explain Alexx's cavewoman theory to us."

"Ask Alexx." Calleigh suggested.

"So you're really not going to tell us her theory?" Eric said after they had eaten.

"You two don't give up do you?" Calleigh challenged.

"It's what makes us good CSI's." Eric said.

"Let's just say Alexx has an interesting interpretation of what constitutions a club and who is doing the clubbing."

"You learn something new everyday." Speed joked.

"Alexx definitely has a side to her we've never seen." Calleigh agreed.

"Who would have thought?" Eric teased.

"As much fun as this is, I have plenty of bullets waiting for me back at the lab."

"How's that going?" Speed asked.

"Four guns, I'm matching the bullets and logging them into the computer. We should be able to get some results but until we get a name on the deceased or find a gun for me to match the bullets to, it's not going to be much help."

"We do what we can." Speed said.

TBC