. >> jeff alvarez was ambushed in rockville. witnesses chased after the suspect.his is cell phone video of the takedown. we sat down with him today and we have his story. >> well jeff alvarez's doctors are amazed how he's recovered. five months ago his life was normal and then it changed one afternoon. >> i never did get a look at him. because it was just -- i was attacked with i believe they said it was a brick. it just hit me in the back of the head. >> jeff alvarez doesn't remember the attack that almost took his life. it happened in rockville. >> they kept saying he's not going to make it. >> his vocal cords are damaged from the breathing tube. he is in a coma. doctors told his family to prepare themselves. >> they said he signed up as an organ donor and we need to take his organs as soon as possible. >> it was just before 4:00 in the afternoon in this parking lot his life almost ended. >> i remember the business day. it was a regular typical day. i had no reason or had no knowledge as to why i was there. >> you just woke up wondering why you were there. >> uh

. >> jeff alvarez doesn't remember the attack that almost took his life.happened in rockville. >> they were telling me, he's not going to make it. his vocal cords were damaged from the breathing tube. doctors told themselves to prepare themselves. >> he signed up as an organ donor. we needed to do that as soon as possible. >> june 17th, alvarez walked out of work just before 4:00 in the afternoon. in this parking lot, his life suddenly changed and almost ended. >> i remember the day. it was a regular, typical day. i had no knowledge as to anyone out there. >> so you just woke up wondering why you were there? >> uh-huh. >> clayton mullenhof has been charged with attempted murder. he's under evaluation to see if he's competent to stand trial. mullenhoff has a record of mental illness. >> do you remember seeing him? >> no. >> alvarez suffered a traumatic brain injury. >> i have so much more time to be able to retain anything when it comes to short -- the short-term memories. >> he's forever grateful for the help of strangers on that day. they worked next door