He was running for 4-1=<<4-1=3>>3 hours
So in that time he runs 3*25=<<3*25=75>>75 miles
Since he slowed down after 4 hours, the time he spent running at 25mph was an additional 4-3=<<4-3=1>>1 hours
So in the first hour they were finding him, he ran 1*25=<<1*25=25>>25 miles
In the second hour they were finding him, he ran 1*10=<<1*10=10>>10 miles
Finally, during the chase, he ran 50*.5=<<50*.5=25>>25 miles
So he is 75+25+10+25=<<75+25+10+25=135>>135 miles away
#### 135