The news that a gang of armed men had robbed a bank and were hold up in a warehouse had come over your police scanner. With Bruce out of town and the others preoccupied meant that it was up to the two of you.

It was raining rather hard when you arrive. The police had the building surrounded, officers standing around talking. A few flashes of lightning lighting up the sky.

Riddler's Daughter pulled her hood more tightly around her face. "Should we consult with the police first?" she asked. "It goes against my grain, but I believe it's what's expected."

Ghostface's face was basically unreadable thanks to the mask, of course, but she nevertheless seemed uncertain.

"Why don't you do it?" she asked.  "I'm not good at that.  Need to know if they have hostages or special weapons or anything."

"Very well," Riddler's Daughter said.  She compressed her cane and stowed it in the back of her belt, then approached the officers that appeared to be in charge. "Pardon me, sirs," she said. "Can we be of assistance?"

"That's certainly a first," the officer said, adjusting his classes in his rain hood. "We have six robbers hold up in the warehouse who have robbed a bank. All of them are armed with high powered shotguns from eyewitnesses. We don't know where in the warehouse they're held up. As far as entrances go, there's the main door, a side door and a skylight."

"No hostages?" Riddler's Daughter asked.

"...Skylight," said Ghostface, quietly.  "For me.  Do you want to split or joint attack?"

Either one could work-- distracting the criminals was good, but they might not think of watching the skylight.

"No hostages, but we have no way of knowing where they are inside," the cop said.

"We have our methods," Riddler's Daughter said, tapping her googles. "Thank you; we'll endeavor to conclude matters quickly."

Returning to Ghostface, she said, "Splitting makes the the most sense; if they're not all together we may be able to pick them off one by one, and if they are we can flank them."

"Right," said Ghostface.  "I'm going up.  I'll scan the room and report to you."

She set out to do so, silently climbing up the side of the building to use her sonar to carefully investigate the building inside.