in ashlea's complex. and that was -- >> i think it was from 12? >> reporter: sure. and then hung around for the afternoon? >> yes. >> reporter: but ashlea had to work that night. >> ashlea's shift was supposed to be from 7:00 p.m. until 3:00 a.m. and alexis agreed to come over during the time she was working to basically take care of ashlea's dog. >> reporter: then alexis told the police and later us that she went back one more time after ashlea got home from work. >> how long did you stay? >> i stayed for an hour. >> reporter: that would make it 4:00 a.m. if alexis was telling the truth, the police had the beginning of a timeline. but before they could check her story or anyone else's for that matter, a neighbor gave them even more to work with. an ex-cop named steve lee had noticed something about 6:30 that morning. so you're out here on -- on the deck having a cigarette. what did you see? >> saw a vehicle parked there that i'd never seen before. >> reporter: what was that vehicle? >> it was a black, ol

. >> reporter: and when they're all together, ashlea is there too. >> announcer: that's all for this edition of "dateline." i'm natalie morales, thanks for watching. >>> welcome to the show tonight, i'm katie phang in for zerlina maxwell. it has been five weeks since russia invaded ukraine and if you want to get a sense of the horror inflicted on civilians look no farther than the southeastern port city of mariupol. the city has been under siege for weeks, with dwindling supplies of food and water for the tens of thousands of civilians that are still trapped there. on friday, some residents were able to leave mariupol but yet another large scale evacuation effort failed. ukrainian officials say russian forces blocked a convoy of 45 buses from leaving and stopped the international red cross from bringing in aid. a senior defense official has confirmed to nbc news that two helicopters struck a fuel storage facility inside of russia on friday. >> it marks the first ukrainian air strike in russia since the invasion began. ukrainian officials also say that russian troops have now left the